Revert "Update all Librem and KGPE-D16 board to build with Linux 5.10.5....
Revert "Update all Librem and KGPE-D16 board to build with Linux 5.10.5. Update KGPE-D16 and Librem linux configs to 5.10.5 with `make savedefconfig`." This reverts commit 9bdf3e01.