[mlir] Clean up includes in Transforms/Passes.h

Differential Revision: https://reviews.llvm.org/D107520

Author: matthias-springer

mlir/lib/Transforms/NormalizeMemRefs.cpp

@@ -17,6 +17,7 @@
 #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"