[mlir] Include llvm/Support/Debug.h in Transforms/Passes.h

There are many downstream users of llvm::dbgs, which is defined in Debug.h. Before D106342, many users included that dependency transitively via the now deleted ViewRegionGraph.h. Adding it back to Transforms/Passes.h for convenience.

Differential Revision: https://reviews.llvm.org/D107451

mlir/include/mlir/Transforms/Passes.h

@@ -17,6 +17,7 @@
 #include "mlir/Pass/Pass.h"
 #include "mlir/Transforms/LocationSnapshot.h"
 #include "mlir/Transforms/ViewOpGraph.h"
+#include "llvm/Support/Debug.h"
 #include <limits>
 
 namespace mlir {

mlir/lib/Transforms/NormalizeMemRefs.cpp

@@ -17,7 +17,6 @@
 #include "mlir/Transforms/Passes.h"
 #include "mlir/Transforms/Utils.h"
 #include "llvm/ADT/SmallSet.h"
-#include "llvm/Support/Debug.h"
 
 #define DEBUG_TYPE "normalize-memrefs"