Allow selecting either SATA or PCIE functionality using uImage.FIT
configurations and device-tree overlays.
By default, PCIE1 is selected (as it has been before this change).
To select SATA instead, you can do this now:
fw_setenv bootconf config-mt7622-bananapi-bpi-r64-sata
and reboot.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>