msm: vidc: Adds VUI timing info support for AVC encoding.

Poor video quality is observed as VUI fps information is not present in
the encoded bit stream. Add support for VUI timing info in video driver
and an additional V4L2 control to set from user space.

CRs-Fixed: 399017
Signed-off-by: Srinu Gorle <sgorle@codeaurora.org>
Conflicts:

	include/linux/videodev2.h

Change-Id: I970d4c479009da2d08531a9e9b8489a84cc5d44c
Signed-off-by: Neha Pandey <nehap@codeaurora.org>