[RFC] Initial support for multicolor LEDs
This implements very rudimentary support for multicolor LEDs as supported by the kernel.
Documentation: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/ABI/testing/sysfs-class-led-multicolor
TODO:
- multi_index should be evaluated for the order of values - unknown if always r-g-b
- max_brightness should be used for the values for multi_intensity
Fixes #24 (closed)