drm/tilcdc: Fix check for remote port parent

In function tilcdc_get_external_components the check for
the remote port parent is not correct. We need a '||' instead of
an '&&'.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
index ad3db4d..849b23e 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_external.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
@@ -154,7 +154,7 @@
 
 	while ((ep = of_graph_get_next_endpoint(dev->of_node, ep))) {
 		node = of_graph_get_remote_port_parent(ep);
-		if (!node && !of_device_is_available(node)) {
+		if (!node || !of_device_is_available(node)) {
 			of_node_put(node);
 			continue;
 		}