Add ubootenv uci config for gl-ar150, gl-domino and gl-mifi
Signed-off-by: Kimmo Vuorinen <kimmo.vuorinen@gmail.com>
[commit message/title facelift]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit dc6dfaac80f392baef1d0d7b06bb1fc19812e041)