hardware: lights: add convenience API method to open a lights device
hardware: lights: add convenience API method to open a lights device

Signed-off-by: Simon Busch <e923d8431f09840b119134ca71ec8d74989d15cc@gravedo.de>

morphis/libhybris,morphis/libhybris,stskeeps/libhybris,stskeeps/libhybris,stskeeps/libhybris,morphis/libhybris