audio: set "Digital Volume"

Change-Id: I3481e1a780ea3834818218650af08feaff57cb90
snd_soc_msm_2x: Clean up, add missing low power tunnel and USB

Change-Id: I130330a00fafd6bf26fa80a895badccb1645919f
audio: use a lower earpiece volume

Change-Id: I93dec9faad3ca5d4d4b3febe927668fd800c51fb
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2