Sound Control: Misc clean up for newer WCD9xxx SOCs

Bump driver version to 3.4

Change-Id: Idaf374634368e61ba1fc9e24d0c5e1a994271400
Signed-off-by: Paul Reioux <reioux@gmail.com>

idea is taken here - https://github.com/faux123/android_kernel_sony_msm8974ab/commit/96c1494d60ae21bc29371c068f66dbac464a8b18