msm: vidc: Cleanup unused structures and features

Lot of unused structures and features in kernel.
Clean this up. Also, pass correct buffer type for plane
constraints setting.

CRs-Fixed: 2368458
Change-Id: I6d09d76f8768a76806d601868348b5c63780ed11
Signed-off-by: Vaibhav Deshu Venkatesh <vdeshuve@codeaurora.org>