sdm: Fix default ROI initialization

Frame buffer resolution can be different from panel resolution for
actionsafe usecase. Initialization of ROI needs to be with respect to
panel resolution, So derive default ROI information from panel width
and height instead of deriving it from frame buffer dest coordinates.

CRs-Fixed: 984159
Change-Id: I0d728a44989acf4041ed479f40f6646f8ba6d719
3 files changed