LED Control port (1/2)

RC part is in preparation by Dirk.

PS2: Removed whitespace
PS3: Removed LED_BRIGHTNESS
PS4: add config keys to control the feature

Change-Id: Ia61b24166b5ace23f09f4eedb0dbea2321f61c8b
Signed-off-by: kecinzer <kecinzer@gmail.com>