input: synaptics_i2c_rmi4: Enable turning off regulators in suspend

In order to save maximum power, turn regulators completely off
instead of just putting into low power mode.

This patch is propagated from msm-3.4 kernel.
(commit: c790dc84494b016ffe65f3bc18793ed6bc6d5ff2
input: synaptics_i2c_rmi4: Enable turning off regulators in suspend)
Also cleaned the checkpatch warnings on msm-3.18 kernel.

Change-Id: I43042283dc1e06a8c26fd7b14556180389869059
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
Signed-off-by: Sudhakar Manapati <smanap@codeaurora.org>