What is on your kernel0 partition?
If that is you stock kernel then:
- stock firmware renamed to miwifi.bin on fat32 formatted usb stick
- execute
fw_setenv flag_try_sys2_failed 1from ssh/serial console - plug usb stick
- reboot
The board will reboot into system 1 (stock basic kernel) and wait with system red light slowly blinking for a FAT formatted usb stick with a recovery image to be inserted. Press and hold the reset button for around 1 second. Status LED will turn yellow during recovery and blue when recovery complete.