sound control 3.x: Initial GPL release for WCD9320 Audio Codec

This is first official GPL release based on my private implementation.

This release has been tested for xperia Z officially.  It may work
with other devices using the same WCD9320 Audio Codec as well, but not tested

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

Sound Control: WCD9320: expose additional controls

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

sound control: WCD9320: update speaker gain control for Z1

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

Sound Control: (Optional) work around for Nexus 4/5 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.

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

Sound Control: (OPTIONAL) add power amp registers access control as well

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

sound control: add register cache

bump to version 3.2

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

sound control: Samsung Microphone compatibility fixup

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

Sound Control: expose direct register manipulations to userspace

bump driver version to 3.3

Change-Id: I75d79f498a3fde536da303d63f615f2cc6d10367
Signed-off-by: Paul Reioux <reioux@gmail.com>
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>
Sound Control: OPPO Find7 variants update

This is OPPO find7 variants UPDATE ONLY... if NOT find7 DO NOT MERGE!

Change-Id: I800126adb46660873a7b9094ec7b38bfad2ab1de
Signed-off-by: Paul Reioux <reioux@gmail.com>
Sound Control: let register lock be dependent on different hw revisions

Change-Id: Id36bfec9bb29e16168af75ff6412d81bb4fbc5b9
Signed-off-by: Paul Reioux <reioux@gmail.com>
Sound Control: separate locking mechanism for recording and playback

with newer hardware revisions coming from Qualcomm, single register lock
control isn't sufficient to cover both playback and recording usage scenarios

bump to version 3.5

Change-Id: I7a3ff80f9fefffd9096b66b23219a07308a973a7
Signed-off-by: Paul Reioux <reioux@gmail.com>