ARM: dts: Define stdout-path property for Peach boards

The kernel can use as the default console a serial port if is defined
as stdout device in the Device Tree.

This allows a board to be booted without the need of having a console
parameter in the kernel command line.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

arch/arm/boot/dts/exynos5420-peach-pit.dts

@@ -43,6 +43,10 @@
 		pinctrl-names = "default";
 	};
 
+	chosen {
+		stdout-path = "serial3:115200n8";
+	};
+
 	fixed-rate-clocks {
 		oscclk {
 			compatible = "samsung,exynos5420-oscclk";

arch/arm/boot/dts/exynos5800-peach-pi.dts

@@ -42,6 +42,10 @@
 		pinctrl-names = "default";
 	};
 
+	chosen {
+		stdout-path = "serial3:115200n8";
+	};
+
 	fixed-rate-clocks {
 		oscclk {
 			compatible = "samsung,exynos5420-oscclk";