input: synaptics: Secure touch clocks

Because of a change in the underlying bus driver, the secure
touch layer in the input drivers is now required to control
directly the clocks which are needed during the touch sessions.
Clocks are turned on/off when the session is started/ended.

This patch is propagated from msm-3.10 kernel
(commit: 21e44aa786f45ba978d3b9660ce06dbf7812cf39
input: synaptics: Secure touch clocks)
Also cleaned checkpatch warnings on msm-3.18 kernel.

Change-Id: Ib123ea6f9f38d990e1ab6e6bdbb776faeb591c11
Acked-by: Christian Bolis <cbolis@qti.qualcomm.com>
Signed-off-by: Keith Fallows <keithf@codeaurora.org>
Signed-off-by: Sudhakar Manapati <smanap@codeaurora.org>