Document referring to LEDs from remote device nodes, such as from camera
sensors.
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NJacek Anaszewski <jacek.anaszewski@gmail.com>