ARM: dts: msm: Add secure touch clocks for msm8916 platforms

Secure touch functions in the Synaptics touch driver now
control directly the clocks required by the TrustZone touch
driver stack.

Change-Id: I532cd3582cc0f41917a1b7d5651cb7fcbcde063d
Acked-by: Christian Bolis <cbolis@qti.qualcomm.com>
Signed-off-by: Keith Fallows <keithf@codeaurora.org>