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>
Change-Id: If01a20b6107429d0c03909adb0a4c296958a493d
sound control: WCD9320: update speaker gain control for Z1

Signed-off-by: Paul Reioux <reioux@gmail.com>
Change-Id: Id8b01e242a6b355e0c48cd04237493850cb764a5