Revert "[msf] Rename Msf to MSF."

This reverts commit 4d1557ffac41e079bcb1abbcf04f512474dcd6fe.

llvm-svn: 277194
diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
index 9d5d212..874a154 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
@@ -22,8 +22,8 @@
 #include "llvm/DebugInfo/CodeView/TypeIndex.h"
 #include "llvm/DebugInfo/CodeView/TypeRecord.h"
 #include "llvm/DebugInfo/CodeView/TypeVisitorCallbacks.h"
-#include "llvm/DebugInfo/MSF/ByteStream.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
+#include "llvm/DebugInfo/Msf/ByteStream.h"
+#include "llvm/DebugInfo/Msf/StreamReader.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCExpr.h"