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>
msm: vidc: Initialize kernel space stack variables

This change initializes kernel space stack variables
that are passed between kernel space and user space
using ioctls.
Non initialization of these variables may lead to
leakage of memory values from the kernel stack to
user space.

Change-Id: Icb195470545ee48b55671ac09798610178e833e1
CRs-fixed: 556771,563420
Signed-off-by: Deepak Verma <dverma@codeaurora.org>
Fix various compiler warnings with gcc-4.7
Change-Id: Ia29ef35dc710721ec15d5e2cf849e027ae0e7724
Correct from last commit
Squashed update of kernel from 3.4.73 to 3.4.74
Update defconfig