Draft: devices: librem5: bootloader stop installing u-boot
The current version of librem5-flash-image
is able to install u-boot
to the eMMC boot partition, so we can just recommend using it for
installing Mobian and stop worrying about that part.
This also means we can simply go with the same process we use for PINE64 devices, as in "just ensure extlinux.conf is valid".