msm: HTC: Update HTC battery drivers

* HTC kernel version: m7-kk-3.4.10-17db3b4

Change-Id: I69b7420a33199b5a48119d846c5fdb221abe2d65

Conflicts:
	arch/arm/mach-msm/htc/htc_battery_8960.c
	arch/arm/mach-msm/htc/htc_battery_cell.c
	arch/arm/mach-msm/htc/htc_battery_core.c
	include/linux/power_supply.h