ARM: dts: marzen: Add serial port config to chosen/stdout-path

Add the serial port config to "chosen/stdout-path", which requires
referring to the port by alias.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7779-marzen.dts

@@ -25,7 +25,7 @@ aliases {
 
 	chosen {
 		bootargs = "ignore_loglevel root=/dev/nfs ip=on";
-		stdout-path = &scif2;
+		stdout-path = "serial0:115200n8";
 	};
 
 	memory@60000000 {