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
Remove button backlight settings, becuse we don't have them

Change-Id: If9553529ffabec6cbc4ba6347ef022490c467a76
Merge branch 'cm-10.2' of git://github.com/CyanogenMod/android_device_motorola_msm8960-common into cm-10.2-mods