Add Voice Earpiece device volume boost

Thanks to ak.akashay@xda
Merge branch 'pa' of github.com:Ultrax5/android_device_sony_xperia_sp into Ultrax5-pa

Conflicts:
	rootdir/system/etc/snd_soc_msm/snd_soc_msm_2x
Merge branch 'Ultrax5-pa' into pa