As of todays #linux-next (https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tag/?h=next-20210112) you can run the #librem5devkit without any additional patches using the default mainline arm64 #defconfig. This means distributions can enable it without trouble from #linux 5.12 onwards. The #librem5 itself needs some more work but it builds a lot on what we have for the devkit.
@agx excellent News! Now il only need my librem 5 ;')