dt-bindings: watchdog: realtek,otto-wdt: add RTL9310

Add the realtek,rtl9310-wdt compatible to the Realtek Otto watchdog
binding.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/84d873d7dd375cd2392f89fa6bd9e0fe5dda4e1c.1656356377.git.sander@svanheule.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml

@@ -29,6 +29,7 @@ properties:
       - realtek,rtl8380-wdt
       - realtek,rtl8390-wdt
       - realtek,rtl9300-wdt
+      - realtek,rtl9310-wdt
 
   reg:
     maxItems: 1