system.prop: remove power saving tweaks, caused data drops

Change-Id: I0e80c58d367179f279dccc72b3d466bab50aa22d
system.prop: fix up usb.config property

Change-Id: I2e9e63518112ee58261de18cc2a35c09cec09f77
system.prop: remove skipdatareg and skipbrokendatacall.

As Dorian pointed out, these are for CDMA

Change-Id: I6119ecb62c8f5bd3d074802af557e1cc1273b3ae
system.prop: remove the excessive ril/telephony configs.

Seems like we are over-doing it here, Lets see how this goes

Change-Id: Id79b28f4d7d6c6c68f4093cc8e195aed24e997eb