Refactor a bunch of includes so that TargetMachine.h doesn't have to include
TargetData.h.  This should make recompiles a bit faster with my current
TargetData tinkering.

llvm-svn: 28238
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
index 0a92b40..c6ea68e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
@@ -16,6 +16,7 @@
 #define DEBUG_TYPE "sched"
 #include "llvm/CodeGen/ScheduleDAG.h"
 #include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Support/Debug.h"