Increase in call volume

*  The in-call volume is rather too low. This is applicable for across all CM based Roms.
   A little boost will go a long way to correct this. Credit XDA user kaos420.

Change-Id: Ia264b49594f4e553828c3a13d25874c840d2b337
d2: fix VOIP

Change-Id: I4cac05a4c43ab2011d96aa15de876e2dba75dacf