drm/amd/display: fix multi edp panel instancing

A previous fix attempted to correct mismatch between DM display
targets and dc panel instancing by only counting connected panels.
This behaviour breaks a feature, thus this is an alternative solution
that allows mapping display targets to dc links during mod_power_create.
Tested-by: NDaniel Wheeler <Daniel.Wheeler@amd.com>
Reviewed-by: NNicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: NRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: NDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -338,14 +338,13 @@ static inline bool dc_get_edp_link_panel_inst(const struct dc *dc,
 	int edp_num, i;
 
 	*inst_out = 0;
-	if (link->connector_signal != SIGNAL_TYPE_EDP || !link->local_sink)
+	if (link->connector_signal != SIGNAL_TYPE_EDP)
 		return false;
 	get_edp_links(dc, edp_links, &edp_num);
 	for (i = 0; i < edp_num; i++) {
 		if (link == edp_links[i])
 			break;
-		if (edp_links[i]->local_sink)
-			(*inst_out)++;
+		(*inst_out)++;
 	}
 	return true;
 }