If the board comes up with OpenWrt that means that the bootloader is
recent enough and knows about the new device tree overlays.
Using /etc/board.d/ is not enough in this case because it doesn't
overwrite existing configuration which may exist (and is fine to exist)
if the user updated with 'sysupgrade -F *.itb' and has kept
configuration. They would still need to manually set compat_version
even though the fact that the bootloader env has been updated can be
implied by the fact that the system has started.
Hence we can always set compat_version=1.1 for those two boards using
uci-defaults.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>