BACKLIGHT_CORGI was later renamed to BACKLIGHT_GENERIC and has not been
used since then. As it's now safe to completely transition to LCD_CORGI
driver, which incorprates both the LCD and backlight device.
Signed-off-by: NChristoph Egger <siccegge@cs.fau.de>
Signed-off-by: NEric Miao <eric.y.miao@gmail.com>