drm/amd/display: add additional flag consideration for surface update

Surface dchub/dpp update would not trigger if a stream update was the
only cause. This change now allows stream flags to trigger this update.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>