msm: cpp: Add dynamic clock setup

The CPP load depends on the frame resolution, which is
processed. CPP clock can vary depending on the load. Thus
the system can be relaxed when smaller resolutions are
processed.

Change-Id: I03dd8e8e6c5e76c6eecccea15f1308f096e3fb7c
Signed-off-by: Iliya Varadzhakov <ivarad@codeaurora.org>