Revert "sound control: add register cache"

This reverts commit 1377a50f2fee510b4fc0a6cca8a3a16d8d98574d.
Revert "Sound Control: (OPTIONAL) add power amp registers access control as well"

This reverts commit 972110d695d4af43d8c1c37f0ee4d40dd4d36b5a.
Revert "Sound Control: (Optional) work around for Nexus 4/5 audio issues"

This reverts commit 926cde6ff7b94bc37591c170b71fd58b651336b0.
Revert "sound control: WCD9320: update speaker gain control for Z1"

This reverts commit 5d824e70d5906e52aa19901ee018da601f1964d6.
Revert "sound control 3.x: Initial GPL release for WCD9320 Audio Codec"

This reverts commit 0f54ca66ad34c7ec1a2829f19e50edbbb64902ef.
Revert "Sound Control: WCD9320: expose additional controls"

This reverts commit bcfd1dd9eafad5200d72e585772659151bb622eb.