Did you do the steps that I outlined in my post with the "what I did" section in it?
Did you create a 200MB or so FAT16 partition on your SD card?
Did you copy the resultant system and kernel files (from target directory) to the SD card as SYSTEM and KERNEL?
Did you copy boot.ini to the SD card?
I copied this file to the SD card: meson64_odroidc2.dtb
When I ran the sd_fuse script, I had to modify it to not do the eject command because it wasn't syncing everything to the SD card before ejecting it. I then ran a manual sync command to let it flush. That may just be a thing on my system, but it's certainly important that the sd_fuse script be allowed to get everything flushed to the SD card or u-boot isn't going to work. Do a dmesg command after running the script and make sure you didn't get a bunch of weird errors.