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>

Conflicts:
	drivers/video/msm/vidc/common/enc/venc.c
	include/linux/msm_vidc_enc.h
	include/media/msm/vcd_property.h