drm/amd/display: add plane size change check condition

[Why]
Driver didn't check plane size and surface size is mismatch.
It will cause pitch data incorrect.

[How]
Add condition to check is plane change and update surface

Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>