ARM: dts: Add stdout-path property to i.MX boards

This adds the stdout-path property to various i.MX boards. Values
of the property have been taken from barebox, so they should be
correct. Also, the older linux,stdout-path property is converted
to stdout-path.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/imx51-babbage.dts

@@ -17,6 +17,10 @@
 	model = "Freescale i.MX51 Babbage Board";
 	compatible = "fsl,imx51-babbage", "fsl,imx51";
 
+	chosen {
+		stdout-path = &uart1;
+	};
+
 	memory {
 		reg = <0x90000000 0x20000000>;
 	};