Enable SVDO. (2/2)

Allow evdo/ehrpd + voice simutaneously.
Use ro.ril.svdo=true
Change-Id: Ifcefd1ee49c5137209b776b00ae8e189dc618247
Merge "Enable SVDO. (2/2)" into cm-10.2
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2