Sound Control: add line gain to cached and register lock

bump version to 3.6

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: flar2 <asegaert@gmail.com>
Add backlight dimmer option
update defconfig and cook scripts

Signed-off-by: MassStash <MassStash@gmail.com>

Conflicts:
	arch/arm/configs/elementalx_defconfig