drm/amd/display: add disconnect_delay to dc_panel_patch

Some display need disconnect delay. Adding this parameter for future use
Signed-off-by: Derek Lai <Derek.Lai@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -191,6 +191,7 @@ union display_content_support {
 };
 
 struct dc_panel_patch {
+	unsigned int disconnect_delay;
 	unsigned int dppowerup_delay;
 	unsigned int extra_t12_ms;
 };