sdm: Add property to define max video upscaling limit.

- Add property 'sdm.video_max_upscale' to define max video upscaling
  by SDE. If video upscaling requirement exceeds max_upscale value,
  SDM will use GPU to compose the video.

CRs-Fixed: 1048082
Change-Id: I489dca73e840675ac6cae76f0e81b6369035ec6a
2 files changed