ASoC: WCD9XXX: Add support for class H PA controller

Class H PA controller analyzes the signal which will be sent to
the PA's (EAR or HPHL/HPHR) in order to adjust the supply voltage
of the PA to make the system as efficient as possible.

Add support for class H PA controller as common code for multiple
audio codecs.

CRs-fixed: 410528
Change-Id: I878a801fcd89f7aa89f1da3d5c8887ec9d7e4d39
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
8 files changed