ARM: dts: nxp: imx51-ts4800: Rename wdt node to watchdog

The Technologic Systems TS-4800 watchdog node was previously named 'wdt',
which violates the core watchdog.yaml schema expecting generic node names.

Rename the node to 'watchdog' to fix the following dtbs_check warning:
'wdt' does not match '^(pmic|timer|watchdog)(@.*|-([0-9]|[1-9][0-9]+))?$'

Signed-off-by: Eduard Bostina <egbostina@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

Author: edybostina

arch/arm/boot/dts/nxp/imx/imx51-ts4800.dts

@@ -155,7 +155,7 @@
 			reg = <0x10000 0x3d>;
 			reg-io-width = <2>;
 
-			wdt {
+			watchdog {
 				compatible = "technologic,ts4800-wdt";
 				syscon = <&syscon 0xe>;
 			};