ARM: dts: am335x-bone-common: use stdout-path in Beaglebone boards.

This commit adds the stdout-path propety in /chosen for all Beaglebone
boards.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-bone-common.dtsi

@@ -18,6 +18,10 @@ memory {
 		reg = <0x80000000 0x10000000>; /* 256 MB */
 	};
 
+	chosen {
+		stdout-path = &uart0;
+	};
+
 	leds {
 		pinctrl-names = "default";
 		pinctrl-0 = <&user_leds_s0>;