hammerhead: Enable USB audio

Change-Id: I83861e0c70eeeb5035f89bfa4c32f19c21236437
hammerhead: Better USB audio support

 * Use new QCOM USB audio path which uses the AFE proxy.
 * This fixes the issues with skips and drops when UI sounds play.

Change-Id: I9941d49b669208959353805f43f51874a415eba3
hammerhead: Always keep 3 buffers ready

 * Reduces overall jank system-wide

Change-Id: I37f6021237c81197063d3fd1fd7e5e07626490c9
hammerhead: Better mount options to improve performance

Change-Id: I18f7165c2ff8547b7968d946336d948fe30522b1
hammerhead: Enable offload for USB audio

Change-Id: I7cc9580865da63330a0bf54d5716ca23a2d6216c
Add support for USB OTG

Change-Id: Id5ded1d14f01e4bd126115866e0bf3bd75d5cfcb
hammerhead: Update cpufreq settings

 * QC is switching to interactive. We will too.

Change-Id: I1ea4bdc75108136aa4b96e91da1a661b0b5d2b07
hammerhead: Remove the maxcpus arg

 * This is fixed in the kernel now.

Change-Id: Icfde43adfb9db4402232e7ef71e3e197dc193d43
hammerhead: disable cpu-boost

* The CPU-boost driver doesn't seem to behave correctly quite yet,
  disable it until it can be fixed.

Change-Id: Idec7151b6324d182828c748ff781de92d320e4f9
hammerhead: Enable ZSL mode for camera

 * With recent kernel changes, we no longer crash when letting the
   preview run during continuous shots. Enjoy rapid-fire shooting.

Change-Id: Ib57869f185166539d761fd5a2766c586501023da
hammerhead: Add offload properties

 * Set fragment size (same as default)
 * Enable gapless playback with offloaded streams
 * Enable offloading for AV (but not streaming AV!)

Change-Id: I1b0f8115bc880bd89f5a0c8ed13e4b54d38e0867
hammerhead: Enable new mixer for offload

Change-Id: I21620d3a2612c992dc70a783f20aa8b73e8c9073

Conflicts:
	BoardConfig.mk