Fix comment for consistency sake.

llvm-svn: 80993
diff --git a/llvm/lib/CodeGen/PHIElimination.h b/llvm/lib/CodeGen/PHIElimination.h
index b06435f..3d02dfd 100644
--- a/llvm/lib/CodeGen/PHIElimination.h
+++ b/llvm/lib/CodeGen/PHIElimination.h
@@ -122,4 +122,4 @@
 
 }
 
-#endif /* PHIELIMINATION_H */
+#endif /* LLVM_CODEGEN_PHIELIMINATION_HPP */