ARM: dts: imx51-zii-scu2-mezz: Disable the internal watchdog

imx51-zii-scu2-mezz has an external watchdog in the environment
microcontroller, so disable the internal one.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx51-zii-scu2-mezz.dts

@@ -346,6 +346,10 @@ &vpu {
 	status = "disabled";
 };
 
+&wdog1 {
+	status = "disabled";
+};
+
 &iomuxc {
 	pinctrl_ecspi1: ecspi1grp {
 		fsl,pins = <