The guide has been updated, now no need to compile the binary.

When this appears, you have loaded uboot to the board successfully.
Now you should use terminal tool to connect serial port or use uboot failsafe web.

"option 2(recommended): push the reset button near the message “NOTICE: Received FIP” appears, wait LED flashes about 5 times and becomes constant-on which indicates uboot failsafe web is ready."

Upgrade fip-mt2500.bin at page http://192.168.1.1/uboot.html
Upgrade openwrt-mt2500-4.6.2-0628-1719560735.bin at page http://192.168.1.1/