ARM: dts: msm: add clock-cntl-support for msm8996 ispif

Without clock-cntl-support setting, some of ispif clocks will be
enabled without set rate.
Have to add clock-cntl-support to let clock-control setting in device
node to take care of which ones should init rate.

Change-Id: I836cf1578f198d7370e347336f334e9929b57994
Signed-off-by: Andy Sun <bins@codeaurora.org>