msm_vidc: Add support for Cx ipeak limitation

Make a vote call whenever the clock frequency driver computes
crosses a threshold mark. This vote call handles the situation
when many subsystems are in turbo and where a need arises to
throttle the CDSP current.

Change-Id: Id10c02749b00fd5a1b1980923c5034648bd35985
Signed-off-by: shubham gupta <shubgupt@codeaurora.org>