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>
diff --git a/arch/arm/boot/dts/imx6q-dmo-edmqmx6.dts b/arch/arm/boot/dts/imx6q-dmo-edmqmx6.dts
index e4ae38f..52446ea 100644
--- a/arch/arm/boot/dts/imx6q-dmo-edmqmx6.dts
+++ b/arch/arm/boot/dts/imx6q-dmo-edmqmx6.dts
@@ -18,6 +18,10 @@
 	model = "Data Modul eDM-QMX6 Board";
 	compatible = "dmo,imx6q-edmqmx6", "fsl,imx6q";
 
+	chosen {
+		stdout-path = &uart2;
+	};
+
 	aliases {
 		gpio7 = &stmpe_gpio1;
 		gpio8 = &stmpe_gpio2;