Don't disable SSE4A when disabling AVX.

Thanks for Craig Topper for noticing it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188902 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index d5392fb..e2898cc 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2120,7 +2120,7 @@
     Features["popcnt"] = Features["sse42"] = false;
   case AVX:
     Features["fma"] = Features["avx"] = false;
-    setXOPLevel(Features, SSE4A, false);
+    setXOPLevel(Features, FMA4, false);
   case AVX2:
     Features["avx2"] = false;
   case AVX512F: