ARM: dts: msm: Add secure touch clocks for msm8994 atmel

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

Change-Id: I96907b69bc669814a1e07a12b34dec9d1f00ed4a
Signed-off-by: Keith Fallows <keithf@codeaurora.org>