dt-bindings: watchdog: Add rockchip,rk3576-wdt compatible

It is compatible with the other rockchip SoCs.
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240903152308.13565-7-detlev.casanova@collabora.comSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml

@@ -29,6 +29,7 @@ properties:
               - rockchip,rk3368-wdt
               - rockchip,rk3399-wdt
               - rockchip,rk3568-wdt
+              - rockchip,rk3576-wdt
               - rockchip,rk3588-wdt
               - rockchip,rv1108-wdt
           - const: snps,dw-wdt