merge SimpleRegisterCoalescing.h into RegisterCoalescer.h.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133896 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Splitter.cpp b/lib/CodeGen/Splitter.cpp
index 08aee82..ec75df4 100644
--- a/lib/CodeGen/Splitter.cpp
+++ b/lib/CodeGen/Splitter.cpp
@@ -11,7 +11,7 @@
 
 #include "Splitter.h"
 
-#include "SimpleRegisterCoalescing.h"
+#include "RegisterCoalescer.h"
 #include "llvm/Module.h"
 #include "llvm/CodeGen/CalcSpillWeights.h"
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"