ARM: dts: am335x-chiliboard: Add stdout-path property

Add stdout-path property in /chosen node so that earlycon can be
used by just adding earlycon in bootargs.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

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

@@ -14,6 +14,10 @@ / {
 	compatible = "grinn,am335x-chiliboard", "grinn,am335x-chilisom",
 		     "ti,am33xx";
 
+	chosen {
+		stdout-path = &uart0;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";