Sound Control: expose additional controls

Change-Id: If91f0ae64394776e523c9a0d4adb3296617273ad
Signed-off-by: Paul Reioux <reioux@gmail.com>
sound control: update speaker gain control for Z1

Change-Id: I94b1e55418c451d543707092ad04c50c40033ebf
Signed-off-by: Paul Reioux <reioux@gmail.com>
Merge changes I94b1e554,If91f0ae6 into du44

* changes:
  sound control: update speaker gain control for Z1
  Sound Control: expose additional controls