Add support for RT4505 flash LED controller. It can support up to 1.5A
flash current with hardware timeout and low input voltage protection.
Signed-off-by: NChiYuan Huang <cy_huang@richtek.com>
Acked-by: NJacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: NPavel Machek <pavel@ucw.cz>