Backout the wrong subtarget emitter fix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164078 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/SubtargetEmitter.cpp b/utils/TableGen/SubtargetEmitter.cpp
index 83b1cb1..aec621f 100644
--- a/utils/TableGen/SubtargetEmitter.cpp
+++ b/utils/TableGen/SubtargetEmitter.cpp
@@ -971,7 +971,7 @@
 
     // The first class is always invalid. We no way to distinguish it except by
     // name and position.
-    assert(SchedClass.Name == "NoItinerary"
+    assert(SchedModels.getSchedClass(0).Name == "NoItinerary"
            && "invalid class not first");
     OS << "  {DBGFIELD(\"InvalidSchedClass\")  "
        << MCSchedClassDesc::InvalidNumMicroOps