--- zzzz-none-000/linux-3.10.107/arch/powerpc/sysdev/mv64x60_udbg.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/sysdev/mv64x60_udbg.c	2021-02-04 17:41:59.000000000 +0000
@@ -85,7 +85,7 @@
 	if (!stdout)
 		return;
 
-	for_each_compatible_node(np, "serial", "marvell,mv64360-mpsc") {
+	for_each_compatible_node(np, NULL, "marvell,mv64360-mpsc") {
 		if (np == stdout)
 			break;
 	}