msm: vidc: Add generic LTR mode support

Use generic LTR HFI APIs for h264 and vp8 formats.

Change-Id: I9f307046d7ec6de4eb6d43704686be902356882a
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>
msm: vidc: Add support to request frame level QP information

The resulting QP information for H264 is the slice level
QP averaged over whole frame; for all other codecs its
frame level QP.

Change-Id: I288904b05d886c1e94fc113b8bd3fba5b13b48f3
Signed-off-by: Jorge Solano Altamirano <jsolano@codeaurora.org>
msm: vidc: Add support to request frame bits info as extra-data

Provides information regarding number of bits in the frame (i.e frame
size expressed in bits) & also the number of bits in frame header (i.e
frame header size expressed in bits).
Number of bits in header is reported as:
For H264, sum of all slice headers bits for all the slices in the frame.
For all other codecs, number of bits in the frame header.

Change-Id: I6caeca025ff0ce059a20891a6d657b47c4b452b3
Signed-off-by: Jorge Solano Altamirano <jsolano@codeaurora.org>