This is what I have been doing but no luck. Perhaps, that is why NETBSD hangs at bootcmd, I suppose (when u-boot/ubldrdts tries loading DTB/FDT). No debug option on; so it only shows hex addresses and hang there after u-boot spins up.
Well, I used the FreeBSD u-boot.img & MLO given that it is all I have here; no NETBSD to build the binaries on. Any URL where I can download those two binaries for NetBSD?