input: synaptics_i2c_rmi4: Properly initialize touch controller

When initializing the touch controller, set sleep mode off bit and
re-check configuration in order to save power.

This patch is propagated from msm-3.10 kernel
(commit: fea8e49c2a63bd7a6337298ad84acdf3136076bd
input: synaptics_i2c_rmi4: Properly initialize touch controller)

Change-Id: I70cc294a536c69109a6292a671f85593ffb09e3e
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>