Figured I'd try my hand at this myself seeing as robimarko doesn't seem to have the time/interest for this.
I rebased the newest branch from his repository onto master and fixed the conflicts there. Builds fine at least.
Haven't been able to get UART working properly though, so I can't test it. RX works, so I see the output, but TX doesn't so i can't interrupt the boot process to TFTP boot an OpenWrt image.