msm: vdec: Update power resources with updated operating rate

Client may choose to configure the session to TURBO mode and
reset it on per frame basis. For such clients, video driver
need not wait for next buffer to scale the power resources.
Doing so, it would lead to a case of high power during the
time video hardware remains idle after processing a frame.
Update the video power resource in alignment with operating
rate to achieve power benefits.

Change-Id: I521ef569cb1ca9287b9b5627d90daacc2051082d
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>