drm/amd/display: Add comments.

Reviewed-by: Dennis Chan <dennis.chan@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Ian Chen <ian.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_link.h

@@ -117,6 +117,7 @@ struct psr_settings {
  * Add a struct dc_panel_config under dc_link
  */
 struct dc_panel_config {
+	// edp DSC
 	struct dsc {
 		bool disable_dsc_edp;
 		unsigned int force_dsc_edp_policy;