s4-common: ril: skip initial radio off

HTC 8960 RIL starts by powering off, avoid sending the power off message
again to allow radio to power up properly.

Change-Id: I0ba5078e3518a59a77462fb887a6173b94ab5b5c
htc s4: use htc ril class

Change-Id: I77f92d8548e5439bd722661e6fc99ffe9a60a9c7
Merge remote-tracking branch 'github/cm-10.1' into cm-10.1-3.4-caf

Change-Id: I6f433ae124e9b74878695ba8ca8098e71fc0e8a6