It was found this device uses a single tri-color power/status LED
rather than individual red/orange LEDs, which also supports green.
Add GPIO for green color and use with `boot` and `running` aliases.
Signed-off-by: Sebastian Schaper <openwrt@sebastianschaper.net>
Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: David Bauer <mail@david-bauer.net>