backlight: lp855x: set zero brightness at FBBLANK
backlight: lp855x: set zero brightness at FBBLANK

When backlight turns on early from display, a white line can be
seen on the screen. Therefore make sure backlight is off when we
are under an fb blank event.

Signed-off-by: Shingo Nakao <ad70c0e34230351462a6fdfb702b90e199e896cc@sonymobile.com>
Cc: Milo Kim <44ea671b8b7a8196e0a2fe07b01cac0858e18926@ti.com>
Cc: Richard Purdie <a03894c799ea916bd571ce8f12ed88f6fb3400f7@rpsys.net>
Signed-off-by: Oskar Andero <c9df5aae2ef47fc44b10c327f669dac43c6c849c@sonymobile.com>
Acked-by: Milo Kim <44ea671b8b7a8196e0a2fe07b01cac0858e18926@ti.com>
Acked-by: Jingoo Han <fc379137a64feb86ce38ec5811a14280acc1ccfc@samsung.com>
Signed-off-by: Tomi Valkeinen <e1ca4dbb8be1acaf20734fecd2da10ed1d46a9bb@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs