bindings: enable example node

Documentation/devicetree/bindings/npu/rockchip,rknn.yaml

@@ -117,7 +117,6 @@ examples:
           power-domains = <&power 0>, <&power 1>, <&power 2>;
           power-domain-names = "npu0", "npu1", "npu2";
           iommus = <&rknpu_mmu>;
-          status = "disabled";
         };
     };
 ...