msm: vidc: Update OPB frame size to firmware

After firmware raises an sequence change sufficient event
to driver, it expects driver to update the OPB frame size. If
driver does not update the OPB frame size, then firmware sticks
to the old resolution and results in decode errors.

Change-Id: I54485b3af00d4fd73e264ecd7cfb91b8a2d8f26b
Signed-off-by: Arun Menon <avmenon@codeaurora.org>