Sound Control: (Optional) work around for WCD93xx audio issues

(Use this only for devices with audio reset issues)

Also bump version to 3.1

Signed-off-by: Paul Reioux <reioux@gmail.com>

wcd9xxx-core: add register write without mutex protection

This is assuming the calling function will take care of the mutex.

Change-Id: I74276220840a467f58b65a1b068390f670f14cbc
Signed-off-by: Paul Reioux <reioux@gmail.com>
Sound Control: (OPTIONAL) add power amp registers access control as well

Change-Id: Iafd5df8939954580b5209a62b868ddda84b72af2
Signed-off-by: Paul Reioux <reioux@gmail.com>
sound control: add register cache

bump to version 3.2

Change-Id: I90f4834215b7e6991074d1eb347d6288aecf5302
Signed-off-by: Paul Reioux <reioux@gmail.com>