ARM: dts: am335x-sl50: Specify the device to be used for boot console output.

UART0 device is the device to be used for boot console output.
Signed-off-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-sl50.dts

@@ -19,6 +19,10 @@
 		};
 	};
 
+	chosen {
+		stdout-path = &uart0;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";