Find7: fix headset detection and buttons

Conflicts:
	sound/soc/codecs/wcd9320.c
	sound/soc/codecs/wcd9xxx-mbhc.c
	sound/soc/msm/msm8974.c

Change-Id: Ic6d1cf0ff2bcea5128f00ff31cc1bd6adbbf2440
Merge "Find7: fix headset detection and buttons" into android-4.4