Add support for the LG M4 (E61x)

Change-Id: I3d5e20585d9a924d48858b115efdd3f3850cb8b5
Merge branch 'm4-jb' into android-msm-3.0-jb

Change-Id: Ia49cc9bb363e5c4a032f989e2e443a2dcb1c5715