Allow using the generic distroboot using extlinux.conf files.
This MR addresses 2 issues preventing the use of extlinux.conf files to boot:
- Missing
fdtfile
env var - Missing env vars pointing to a RAM space usable for decompressing kernels
With both those commits, we can use a simple extlinux.conf file (generated by e.g. u-boot-menu
) and not bother with a custom boot script anymore.