Update tf.DeviceIndex in TF MLIR ODS.

Op was missing a description field and this is autogenerated from TensorFlow op registry.

PiperOrigin-RevId: 316217919
Change-Id: Ibcf8e4bb4691e30d1e5e739ae4e4cbfe21228a3e

tensorflow/compiler/mlir/tensorflow/ir/tf_generated_ops.td

@@ -2384,6 +2384,9 @@ horizontal and vertices strides, `strides = [1, stride, stride, 1]`.
 def TF_DeviceIndexOp : TF_Op<"DeviceIndex", [NoSideEffect]> {
   let summary = "Return the index of device the op runs.";
 
+  let description = [{
+  }];
+
   let arguments = (ins
     StrArrayAttr:$device_names
   );