Revert "sound control: add register cache"

This reverts commit 25f7e15c5859dac4ed5d9d6fe5c9a74cc1c69830.
Revert "Sound Control: (OPTIONAL) add power amp registers access control as well"

This reverts commit c9853d6627ff1a5cb71418f18e06ea02650cb2af.
Revert "snd: adapt sound_control for newer wcd9230 codecs"

This reverts commit 7923b6bbd39b3fdbbb70c4d95e26c0b5c4e4f74a.
Revert "Sound Control: (Optional) work around for Nexus 4/5 audio issues"

This reverts commit af1da388645abcdc1194d6b328c9157133aff913.
Revert "Add Sound Control 3"

This reverts commit fc08b6dfbaccb2ec9ad159831e3dc74998a65d71.
Revert "Sound Control: WCD9320: expose additional controls"

This reverts commit d5d4c393c4eb92bd853832851ad9076b68fc4001.