drm/amd/display: Make dc_link param const in set_drive_settings

Signed-off-by: Zeyu Fan <Zeyu.Fan@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -605,7 +605,7 @@ static bool is_max_vs_reached(
 }
 
 void dc_link_dp_set_drive_settings(
-	struct dc_link *link,
+	const struct dc_link *link,
 	struct link_training_settings *lt_settings)
 {
 	struct core_link *core_link = DC_LINK_TO_CORE(link);

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

@@ -691,7 +691,7 @@ void dc_link_remove_remote_sink(
 void dc_link_set_sink(const struct dc_link *link, struct dc_sink *sink);
 
 void dc_link_dp_set_drive_settings(
-	struct dc_link *link,
+	const struct dc_link *link,
 	struct link_training_settings *lt_settings);
 
 bool dc_link_dp_perform_link_training(