dt-bindings: interrupt-controller: arm,gic-v3: Add missing type to interrupt-partition-* nodes

Add missing 'type: object' schema to interrupt-partition-* nodes. Found
with fix to meta-schema checks.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml

@@ -138,6 +138,7 @@ properties:
       containing a set of sub-nodes.
     patternProperties:
       "^interrupt-partition-[0-9]+$":
+        type: object
         properties:
           affinity:
             $ref: /schemas/types.yaml#/definitions/phandle-array