message: Add a if_mlir rule.
diff: @@ -2483,3 +2483,9 @@ def if_cuda_or_rocm(if_true, if_false = []):
  def tf_jit_compilation_passes_extra_deps():
  return []
  +
  +def if_mlir(if_true, if_false = []):
  + return select({
  + "//conditions:default": if_false,
  + "//tensorflow:with_mlir_support": if_true,
  + })
  