Add the possibility that colored LEDs can also be configured via the uci.
config led 'led1'
option name '<name>'
option sysfs '<path>'
option trigger 'default-on'
option default '1'
--> option color_{$color} '<0-255>'
The supported names of the variable "${color}" for the selected LED can be
queried in the file with the name 'multi_index'.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>