Rename FMA3 feature flag to just FMA to match gcc so it can be added to clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157903 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 3b60be5..5be3126 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -206,8 +206,8 @@
     ToggleFeature(X86::FeaturePCLMUL);
   }
   if ((ECX >> 12) & 0x1) {
-    HasFMA3 = true;
-    ToggleFeature(X86::FeatureFMA3);
+    HasFMA = true;
+    ToggleFeature(X86::FeatureFMA);
   }
   if (IsIntel && ((ECX >> 22) & 0x1)) {
     HasMOVBE = true;
@@ -327,7 +327,7 @@
   , HasSSE4A(false)
   , HasAES(false)
   , HasPCLMUL(false)
-  , HasFMA3(false)
+  , HasFMA(false)
   , HasFMA4(false)
   , HasXOP(false)
   , HasMOVBE(false)