CodeGen: Remove a few more ilist iterator implicit conversions, NFC

llvm-svn: 249875
diff --git a/llvm/lib/CodeGen/DFAPacketizer.cpp b/llvm/lib/CodeGen/DFAPacketizer.cpp
index 0a188c0..4df986f 100644
--- a/llvm/lib/CodeGen/DFAPacketizer.cpp
+++ b/llvm/lib/CodeGen/DFAPacketizer.cpp
@@ -147,7 +147,7 @@
                                          MachineInstr *MI) {
   if (CurrentPacketMIs.size() > 1) {
     MachineInstr *MIFirst = CurrentPacketMIs.front();
-    finalizeBundle(*MBB, MIFirst, MI);
+    finalizeBundle(*MBB, MIFirst->getIterator(), MI->getIterator());
   }
   CurrentPacketMIs.clear();
   ResourceTracker->clearResources();