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: Ic0de960d92a771d74c303dac7100734d6411fc45
Signed-off-by: Deepak Verma <dverma@codeaurora.org>
msm: vidc: Add LTR feature for H264 encoder
This change adds Long Term Reference picture
selection feature for H264 video encoder.

Change-Id: Ida957df244d8715c955afe8d809708123a94e999
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>