Clean up ARM subtarget code by using Triple ADT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123276 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMHazardRecognizer.cpp b/lib/Target/ARM/ARMHazardRecognizer.cpp
index 683a7cc..676b01e 100644
--- a/lib/Target/ARM/ARMHazardRecognizer.cpp
+++ b/lib/Target/ARM/ARMHazardRecognizer.cpp
@@ -9,6 +9,7 @@
 
 #include "ARMHazardRecognizer.h"
 #include "ARMBaseInstrInfo.h"
+#include "ARMBaseRegisterInfo.h"
 #include "ARMSubtarget.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/ScheduleDAG.h"