ASoC: wcd9335: Add support for voltage scaling feature

SIDO buck voltage can be dropped down to low voltage
when no audio usecase running. Update the sido buck
voltage to nominal or low voltage(svs) based on active
CPE or audio usecases.

Change-Id: Ie6caff7c264fa7f169098acf4e8fe1cc60c97d22
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>