dt-bindings: watchdog: fsl-imx-wdt: add compatible string fsl,ls1046a-wdt

Add compatible string fsl,ls1046a-wdt for ls1046a SoC. fsl,ls1046a-wdt
allows big-endian property.

Signed-off-by: Meng Li <Meng.Li@windriver.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250608030616.3874517-2-Meng.Li@windriver.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Author: limeng-linux

Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml

@@ -37,6 +37,7 @@ properties:
               - fsl,ls1012a-wdt
               - fsl,ls1021a-wdt
               - fsl,ls1043a-wdt
+              - fsl,ls1046a-wdt
               - fsl,vf610-wdt
           - const: fsl,imx21-wdt
 
@@ -105,6 +106,7 @@ allOf:
                 - fsl,ls1012a-wdt
                 - fsl,ls1021a-wdt
                 - fsl,ls1043a-wdt
+                - fsl,ls1046a-wdt
     then:
       properties:
         big-endian: false