Prune includes in X86 target.

llvm-svn: 204216
diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h
index 6a6377f..9875b70 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.h
+++ b/llvm/lib/Target/X86/X86InstrInfo.h
@@ -14,7 +14,7 @@
 #ifndef X86INSTRUCTIONINFO_H
 #define X86INSTRUCTIONINFO_H
 
-#include "X86.h"
+#include "MCTargetDesc/X86BaseInfo.h"
 #include "X86RegisterInfo.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/Target/TargetInstrInfo.h"