dt-bindings: watchdog: starfive,jh7100-wdt: Add compatible for JH8100

Add "starfive,jh8100-wdt" compatible string for StarFive's JH8100
watchdog.
Since JH8100 watchdog only has 1 reset signal, update binding
document to support one reset for "starfive,jh8100-wdt" compatible.

Signed-off-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
Signed-off-by: Ji Sheng Teoh <jisheng.teoh@starfivetech.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231221084358.3458713-2-jisheng.teoh@starfivetech.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml

@@ -19,14 +19,16 @@ description:
   isn't cleared, the watchdog will reset the system unless the watchdog
   reset is disabled.
 
-allOf:
-  - $ref: watchdog.yaml#
-
 properties:
   compatible:
-    enum:
-      - starfive,jh7100-wdt
-      - starfive,jh7110-wdt
+    oneOf:
+      - enum:
+          - starfive,jh7100-wdt
+          - starfive,jh7110-wdt
+      - items:
+          - enum:
+              - starfive,jh8100-wdt
+          - const: starfive,jh7110-wdt
 
   reg:
     maxItems: 1
@@ -45,9 +47,8 @@ properties:
       - const: core
 
   resets:
-    items:
-      - description: APB reset
-      - description: Core reset
+    minItems: 1
+    maxItems: 2
 
 required:
   - compatible
@@ -56,6 +57,27 @@ required:
   - clock-names
   - resets
 
+allOf:
+  - $ref: watchdog.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - starfive,jh8100-wdt
+    then:
+      properties:
+        resets:
+          items:
+            - description: Core reset
+    else:
+      properties:
+        resets:
+          items:
+            - description: APB reset
+            - description: Core reset
+
 unevaluatedProperties: false
 
 examples: