[mlir] Add include guard to TOSA tblgen passes

[stellaraccident]

Thank you - not having this was unintentional.

[sjarus]

Thank you for adding this!

mlir/include/mlir/Dialect/Tosa/Transforms/Passes.td

 //===-- Passes.td - TOSA optimization pass declarations ----*- tablegen -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the optimization passes for the TOSA Dialect in MLIR.
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef MLIR_DIALECT_TOSA_TRANSFORMS_PASSES
+#define MLIR_DIALECT_TOSA_TRANSFORMS_PASSES
+
 include "mlir/Pass/PassBase.td"
 
 def TosaMakeBroadcastable : FunctionPass<"tosa-make-broadcastable"> {
   let summary = "TOSA rank Reshape to enable Broadcasting";
   let description = [{
     Pass that enables broadcast by making all input arrays have the same
     number of dimensions. Insert RESHAPE operations to prepend dimensions
     of size one until the number of dimensions is equal. Implements
     approach similar to step 1 of Numpy 4-step broadcasting:
     https://numpy.org/doc/stable/reference/ufuncs.html#broadcasting
   }];
 
   let constructor = "createTosaMakeBroadcastablePass()";
 }
+
+#endif // MLIR_DIALECT_TOSA_TRANSFORMS_PASSES