drm/msm/mdp5: fix cursor ROI
drm/msm/mdp5: fix cursor ROI

If cursor is set near the edge of the screen, it is not valid to use the
new cursor width/height as the ROI dimensions.  Split out the ROI calc
and use it both cursor_set and cursor_move.

Signed-off-by: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs