t0lte: partial revert of audio boost

- revert headset audio level
- drop speaker boost down a notch

Change-Id: Ic187a632e1519c88bb0bf2d4b536766a5ee9ab71
Merge "t0lte: partial revert of audio boost" into cm-11.0
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_t0lte into cd-4.4