audio-caf: resurrect msm8660 audio

Change-Id: Id049d90a74ee63f05d7a6e8fbda38bca5ade7116
audio: msm8660: Update references to AUDIO_FORMAT

* We should use AUDIO_FORMAT_XXXXX instead of AudioSystem::XXXXX
  definitions.

Change-Id: Idb56bc07f8950cb2f1280f4e0db87fd494782c34
legacy/msm8660: Enable support for LPA/Tunnel audio playback

 - based off http://review.cyanogenmod.org/#/c/53196

Change-Id: I12edbf103fe3a5a81451d2b4242bf77342b64ff9