add a WMI Asus driver, to control keyboard backlight brightness. Change-Id: Ib86f70b4a407178b0a1f532269387a55915cc460 Reviewed-on: https://review.haiku-os.org/c/haiku/+/2485 Reviewed-by: Fredrik Holmqvist <[email protected]> Reviewed-by: Adrien Destugues <[email protected]>