revert: i9305: user configureable voice/streaming volumes

This reverts the user configureable voice/streaming volumes patch,
but keeps the cleaned up parts in audio_hw.c

Change-Id: I76f242880d04e275e5977665c9d4d1ad35d5dd8e
Merge branch 'cm-10.1' of https://github.com/CyanogenMod/android_device_samsung_i9305.git into cm-10.2

Conflicts:
	rootdir/init.smdk4x12.rc