Consider moving to Tianocore EDK2 as the rest of SBC

[hwspeedy]

All distros are moving to grub with efi to support one image for each architecture.

Please consider adding Tianocore EDK2 - ARM EFI, works great on rPI 5B - easy install and easy to select boot.

https://github.com/tianocore/edk2-platforms/blob/master/Platform/ARM/Readme.md