msm8960-common: Revert qcril radio changes

Revert "msm8960-common: libril: clarify naming of VOICE_RADIO_TECH_CHANGED"

This reverts commit 22101e0daddffbabf6af836f8197b92e81143ca7.

Revert "libril: update unsol htc responses and add support for m7."

This reverts commit 070fa9c69d353b5163bada7acdde5e4d1458e157.

Revert "msm8960-common: update libril from qcril branch"

This reverts commit dbaa00a55306eeae4e65b86a687244cc8ca95712.

Change-Id: I4168362ef4965227604ee8e70608ebe27b486eec