s6evr02: Allow max brightness at 255

Change-Id: I464de83d010702ed68759f2bde438c127811bd2e
Fixed MHL no sound issue

Revert : ASoC: wm8994: Ensure there are enough BCLKs for four channels

commit b8edf3e5522735c8ce78b81845f7a1a2d4a08626 upstream.

Otherwise if someone tries to use all four channels on AIF1 with the
device in master mode we won't be able to clock out all the data.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 (reverse-merged from commit 3b6ae1807d29f8cacd63fddf513110f9308b4c8e)