dt-bindings: pinctrl: sunxi: Make interrupts optional

The R_PIO pinctrl device on the Allwinner H616 SoC does not have an
interrupt (it features only two pins).
However the binding requires at least naming one upstream interrupt,
plus the #interrupt-cells and interrupt-controller properties.

Drop the unconditional requirement for the interrupt properties, and
make them dependent on being not this particular pinctrl device.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220708105235.3983266-3-andre.przywara@arm.com

Documentation/devicetree/bindings/pinctrl/allwinner,sun4i-a10-pinctrl.yaml

@@ -133,14 +133,11 @@ patternProperties:
 
 required:
   - "#gpio-cells"
-  - "#interrupt-cells"
   - compatible
   - reg
-  - interrupts
   - clocks
   - clock-names
   - gpio-controller
-  - interrupt-controller
 
 allOf:
   # FIXME: We should have the pin bank supplies here, but not a lot of
@@ -148,6 +145,19 @@ allOf:
   # warnings.
 
   - $ref: "pinctrl.yaml#"
+  - if:
+      not:
+        properties:
+          compatible:
+            enum:
+              - allwinner,sun50i-h616-r-pinctrl
+
+    then:
+      required:
+        - "#interrupt-cells"
+        - interrupts
+        - interrupt-controller
+
   - if:
       properties:
         compatible: