message: Add an attribute to mlir::TF::CollectiveReduceV2.
diff: @@ -2206,7 +2206,8 @@ Mutually reduces multiple tensors of identical type and shape.
  TF_AnyStrAttrOf<["Min", "Max", "Mul", "Add"]>:$merge_op,
  TF_AnyStrAttrOf<["Id", "Div"]>:$final_op,
  DefaultValuedAttr<StrAttr, "auto">:$communication_hint,
  - DefaultValuedAttr<F32Attr, "0.0f">:$timeout_seconds
  + DefaultValuedAttr<F32Attr, "0.0f">:$timeout_seconds,
  + DefaultValuedAttr<I64Attr, "-1">:$max_subdivs_per_device
  );
  let results = (outs
  