msm: vidc: Enable AVG QP extradata

Enable the HFI to request firmware to add average QP extradata
for use cases requiring the enablement of average QP statistics.

Change-Id: Ia628068fdd3608cf29c28fa7603c7fc9e3f95a41
Signed-off-by: Indranil Chakraborty <ichakrab@codeaurora.org>