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-gk802.dts b/arch/arm/boot/dts/imx6q-gk802.dts
index 0f0c50b..703539c 100644
--- a/arch/arm/boot/dts/imx6q-gk802.dts
+++ b/arch/arm/boot/dts/imx6q-gk802.dts
@@ -14,7 +14,7 @@
 	compatible = "zealz,imx6q-gk802", "fsl,imx6q";
 
 	chosen {
-		linux,stdout-path = &uart4;
+		stdout-path = &uart4;
 	};
 
 	memory {