msm: vidc: Update device clock after cx ipeak logic

Existing code updates the device clock before cx ipeak logic.
As a result, the cx ipeak takes a decision based on updated
clock rather than the clock at which the device was running.
With the change, device clock is updated after the cx ipeak
is decided.

Change-Id: Icfde29176f8adb3a12c68a611f47b83ca7a8e4a9
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>