[split] U-Boot with NVMe support, keyboard & display working

[belfastraven]

OK, so I finally was able to build working (sort of) uboot with nvme boot, display and keyboard thanks to Arnaud and @samueldr work.

It boots my 5.8-rc5 but inconsistently. In 15 tries I have 5 failed boots.

If someone is brave enough to test it - I can share SPI image or images for SD/eMMC.

I'd be happy to try the SPIFLASH build--I can always back it off and rewrite the working one.  I do have serial output enabled so I can probably help debug.  if you are still without your serial cable.   I would be using a standard Manjaro 5.7 kernel.  I think we are using the same brand/model of NVME  SBXe  except mine is only a 480G.