AMDGPU: Add fast fmaf feature to gfx702

Differential Revision: https://reviews.llvm.org/D43790

llvm-svn: 326252
diff --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index d799218..aa1a642 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -546,7 +546,8 @@
 
 def FeatureISAVersion7_0_2 : SubtargetFeatureISAVersion <7,0,2,
   [FeatureSeaIslands,
-   FeatureLDSBankCount16]>;
+   FeatureLDSBankCount16,
+   FeatureFastFMAF32]>;
 
 def FeatureISAVersion7_0_3 : SubtargetFeatureISAVersion <7,0,3,
   [FeatureSeaIslands,