I am having the same issue still attempting to build for the MT1300:
time: package/linux/compile#4.30#0.96#5.24
fsg_builder | make[2]: Entering directory ‘/package_builder/sdk/1907/ramips/feeds/base/package/kernel/cryptodev-linux’
fsg_builder | rm -f /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.built
fsg_builder | touch /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.built_check
fsg_builder | cat /dev/null > /package_builder/sdk/1907/ramips/staging_dir/target-mipsel_24kc_musl/pkginfo/cryptodev-linux.symvers; for subdir in .; do cat /package_builder/sdk/1907/ramips/staging_dir/target-mipsel_24kc_musl/pkginfo/.symvers 2>/dev/null > /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/$subdir/Module.symvers; done
fsg_builder | make -C /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10 HOSTCFLAGS=“-O2 -I/package_builder/sdk/1907/ramips/staging_dir/host/include -I/package_builder/sdk/1907/ramips/staging_dir/hostpkg/include -I/package_builder/sdk/1907/ramips/staging_dir/target-mipsel_24kc_musl/host/include -Wall -Wmissing-prototypes -Wstrict-prototypes” CROSS_COMPILE=“mipsel-openwrt-linux-musl-” ARCH=“mips” KBUILD_HAVE_NLS=no KBUILD_BUILD_USER=“” KBUILD_BUILD_HOST=“” KBUILD_BUILD_TIMESTAMP=“Sun Sep 6 16:19:39 2020” KBUILD_BUILD_VERSION=“0” HOST_LOADLIBES=“-L/package_builder/sdk/1907/ramips/staging_dir/host/lib” CONFIG_SHELL=“bash” V=1 cmd_syscalls= KERNELRELEASE=4.14.195 KERNEL_DIR=“/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/linux-4.14.195”
fsg_builder | make[3]: Entering directory ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10’
fsg_builder | make -C /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/linux-4.14.195 M=/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10 ARCH=mips CROSS_COMPILE=mipsel-openwrt-linux-musl- modules
fsg_builder | make[4]: Entering directory ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/linux-4.14.195’
fsg_builder | test -e include/generated/autoconf.h -a -e include/config/auto.conf || (
fsg_builder | echo >&2;
fsg_builder | echo >&2 " ERROR: Kernel configuration is invalid.“;
fsg_builder | echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.”;
fsg_builder | echo >&2 " Run ‘make oldconfig && make prepare’ on kernel src to fix it.";
fsg_builder | echo >&2 ;
fsg_builder | /bin/false)
fsg_builder | mkdir -p /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.tmp_versions ; rm -f /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.tmp_versions/
fsg_builder | make -f ./scripts/Makefile.build obj=/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10
fsg_builder | mipsel-openwrt-linux-musl-gcc -Wp,-MD,/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.ioctl.o.d -nostdinc -isystem /package_builder/sdk/1907/ramips/staging_dir/toolchain-mipsel_24kc_gcc-7.5.0_musl/bin/…/lib/gcc/mipsel-openwrt-linux-musl/7.5.0/include -I./arch/mips/include -I./arch/mips/include/generated -I./include -I./arch/mips/include/uapi -I./arch/mips/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -DVMLINUX_LOAD_ADDRESS=0xffffffff80001000 -DLINKER_LOAD_ADDRESS=0x80001000 -DDATAOFFSET=0 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-PIE -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -mno-branch-likely -msoft-float -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float -ffreestanding -fno-stack-check -march=mips32r2 -mtune=34kc -Wa,–trap -DTOOLCHAIN_SUPPORTS_VIRT -I./arch/mips/include/asm/mach-ralink -I./arch/mips/include/asm/mach-ralink/mt7621 -I./arch/mips/include/asm/mach-generic -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-int-in-bool-context -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves --param=allow-store-data-races=0 -DCC_HAVE_ASM_GOTO -Wframe-larger-than=1024 -fstack-protector -Wno-unused-but-set-variable -Wno-unused-const-variable -fomit-frame-pointer -fno-var-tracking-assignments -g -femit-struct-debug-baseonly -fno-var-tracking -Wdeclaration-after-statement -Wno-pointer-sign -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -I/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10 -DMODULE -mno-long-calls -DKBUILD_BASENAME=‘“ioctl”’ -DKBUILD_MODNAME=‘“cryptodev”’ -c -o /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/ioctl.o /package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/ioctl.c
fsg_builder | /bin/sh: 1: scripts/basic/fixdep: not found
fsg_builder | scripts/Makefile.build:326: recipe for target ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/ioctl.o’ failed
fsg_builder | make[5]: *** [/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/ioctl.o] Error 127
fsg_builder | make[5]: *** Deleting file ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/ioctl.o’
fsg_builder | Makefile:1550: recipe for target ‘module/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10’ failed
fsg_builder | make[4]: Leaving directory ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/linux-4.14.195’
fsg_builder | make[4]: *** [module/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10] Error 2
fsg_builder | make[3]: *** [build] Error 2
fsg_builder | Makefile:27: recipe for target ‘build’ failed
fsg_builder | make[3]: Leaving directory ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10’
fsg_builder | Makefile:58: recipe for target ‘/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.built’ failed
fsg_builder | make[2]: Leaving directory ‘/package_builder/sdk/1907/ramips/feeds/base/package/kernel/cryptodev-linux’
fsg_builder | make[2]: *** [/package_builder/sdk/1907/ramips/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/cryptodev-linux-cryptodev-linux-1.10/.built] Error 2
fsg_builder | time: package/feeds/base/cryptodev-linux/compile#1.78#1.54#2.99
fsg_builder | package/Makefile:111: recipe for target ‘package/feeds/base/cryptodev-linux/compile’ failed
fsg_builder | make[1]: Leaving directory ‘/package_builder/sdk/1907/ramips’
fsg_builder | make[1]: *** [package/feeds/base/cryptodev-linux/compile] Error 2