msm: vidc: add support for the bitstream_restrict flag

Adds support for the MFC core to add the bitstream_restrict flag in the
sps/pps for H264 codecs.  This allows for the decoder to determine how
many frames to buffer when decoding.

Change-Id: I0415de0704d0f0d5099cc97ca7937c955e504883
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>