msm: krait: add CPU Voltage control.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
sound_control: initial code push for Headphones gain userspace interface.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>

Conflicts:
	drivers/misc/Makefile
	sound/soc/codecs/wcd9320.c