dt-bindings: interrupt-controller: realtek,rtl-intc: Add rtl9300-intc

Add a compatible string for the interrupt controller found on the
rtl930x SoCs. The interrupt controller has registers for VPE1 so these
are added as a second reg cell.

Signed-off-by: Chris Packham <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

Documentation/devicetree/bindings/interrupt-controller/realtek,rtl-intc.yaml

···
       - items:
           - enum:
               - realtek,rtl8380-intc
+              - realtek,rtl9300-intc
           - const: realtek,rtl-intc
       - const: realtek,rtl-intc
         deprecated: true
···
     const: 1
 
   reg:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: vpe0 registers
+      - description: vpe1 registers
 
   interrupts:
     minItems: 1
···
     else:
       required:
         - interrupts
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: realtek,rtl9300-intc
+    then:
+      properties:
+        reg:
+          minItems: 2
+          maxItems: 2
+    else:
+      properties:
+        reg:
+          maxItems: 1
 
 additionalProperties: false