msm8960: add s2w

Change-Id: I7feca3ed2cc8d925f40ea9acfe2fbc68b6209e92

fine tune values for correct triggering

Change-Id: I7feca3ed2cc8d925f40ea9acfe2fbc68b6209e92

Conflicts:
	drivers/input/touchscreen/Kconfig
	drivers/input/touchscreen/synaptics_3200.c
	include/linux/synaptics_i2c_rmi.h