Remove the TargetMachine forwards for TargetSubtargetInfo based
information and update all callers. No functional change.

llvm-svn: 214781
diff --git a/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h b/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h
index 8c41086..018653c 100644
--- a/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h
+++ b/llvm/lib/Target/Hexagon/HexagonMachineScheduler.h
@@ -56,7 +56,9 @@
 public:
 VLIWResourceModel(const TargetMachine &TM, const TargetSchedModel *SM) :
     SchedModel(SM), TotalPackets(0) {
-    ResourcesModel = TM.getInstrInfo()->CreateTargetScheduleState(&TM, nullptr);
+  ResourcesModel =
+      TM.getSubtargetImpl()->getInstrInfo()->CreateTargetScheduleState(&TM,
+                                                                       nullptr);
 
     // This hard requirement could be relaxed,
     // but for now do not let it proceed.