Sound Control: WCD9320: expose additional controls

This reverts commit 9d95c145415fbe352c13208e400cdaed7d5476df.
sound control 3.x: Initial GPL release for WCD9320 Audio Codec

This reverts commit f5f0f3744a6df3552bebbf5210f8cce50b79e5f8.
sound control: WCD9320: update speaker gain control for Z1

This reverts commit 09d375586baeef57f4c8abe6434e9616229c4f66.
Sound Control: (Optional) work around for Nexus 4/5 audio issues

This reverts commit c7f6f5eebb8389006beaab46844c09341e58ebcc.
Sound Control: (OPTIONAL) add power amp registers access control as well

This reverts commit 4069c0ca908801c42ff1f219b64a9dc7a8c4ce1b.
sound control: add register cache

This reverts commit 10f8b9e69d4e65dfbbcae106ac270b821a68d5ad.
sync with faux soundcontrol

Change-Id: I3dd1a7bfc3addb4111e3cf6c1839f3ada107979e