Add support for multicolor LEDs as supported by the kernel.
Used by Qualcomm devices such as SHIFT 6mq, OnePlus 6, etc.
Documentation:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/ABI/testing/sysfs-class-led-multicolor
Co-Developed-by:
Dylan Van Assche<me@dylanvanassche.be>
