Sound Control: expose direct register manipulations to userspace

bump driver version to 3.3

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: engstk <eng.stk@sapo.pt>
Sound Control: Misc clean up for newer WCD9xxx SOCs

Bump driver version to 3.4

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: engstk <eng.stk@sapo.pt>
Sound Control: let register lock be dependent on different hw revisions

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: engstk <eng.stk@sapo.pt>
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

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: engstk <eng.stk@sapo.pt>
Sound Control: add line gain to cached and register lock

bump version to 3.6

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: engstk <eng.stk@sapo.pt>