msm8960-common: remove NEW_ION_API define

* NEW_ION_API is the default now, this define is unnecessary.

Change-Id: I51c9d7211348c27fb72687058344cf8bc7ddb621
msm8960-common: libril: support v6 signal strength as well

* Recent HTC radios are using what appears to be a standard v6 signal
  strength format again.

Change-Id: Iea3bd09b43a47d57daccfe5d1c5f6fa9e024ea99
Merge remote-tracking branch 'cm/cm-10.2' into merge_cm