drm/amd/display: Add disable_psr debug flag

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -180,6 +180,7 @@ struct dc_debug {
 	bool disable_pplib_clock_request;
 	bool disable_clock_gate;
 	bool disable_dmcu;
+	bool disable_psr;
 	bool force_abm_enable;
 };