as3676: full brightness on boot & cwm

Use 100% of brightness during boot & in cwm, same behaviour like the old driver

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I721b98d67399841e809e82dbad1c9492ec7a74f4
as3676: fix iyokan & mango keyboard backlight

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I2d1dc0a2eddd902b69674ef2a686e1191b8e4735