According to the User Manual, there is a "Wi-Fi LED" with blue and
green colors, doing the following by default:
Flashing Blue: System loading
Solid Blue: System loaded
Flashing Green: Connecting to the Internet
Solid Green: Connected to the Internet
According to this vendor behavior, we keep refer to the LED as "wifi"
but implement the according default behavior as in OEM firmware.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>