msm: vidc: add computer vision program (CVP) features

Add computer vision program (CVP) design for video IRIS2
hardware and utilize its features to enhance video encoding
quality. Reorganised files to accommodate internal (IRIS1)
and external (IRIS2) CVP processing.

Change-Id: Ic2c930a091fbaeb859153a13905c9786602f16a3
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>