dt-bindings: watchdog: renesas,wdt: Add support for RZ/N1

Describe the WDT hardware in the RZ/N1 series.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220427135531.708279-2-jjhiblot@traphandler.com
[groeck: Rebased, fixed conflicts]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml

@@ -19,6 +19,11 @@ properties:
               - renesas,r7s9210-wdt      # RZ/A2
           - const: renesas,rza-wdt       # RZ/A
 
+      - items:
+          - enum:
+              - renesas,r9a06g032-wdt    # RZ/N1D
+          - const: renesas,rzn1-wdt      # RZ/N1
+
       - items:
           - enum:
               - renesas,r9a07g043-wdt    # RZ/G2UL
@@ -96,6 +101,7 @@ allOf:
             contains:
               enum:
                 - renesas,rza-wdt
+                - renesas,rzn1-wdt
     then:
       required:
         - power-domains