AMDGPU: Add Vega12 and Vega20

Changes by
  Matt Arsenault
  Konstantin Zhuravlyov

llvm-svn: 331215
diff --git a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
index 706f017..8f687fd 100644
--- a/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
@@ -221,6 +221,10 @@
     return {9, 0, 0};
   if (Features.test(FeatureISAVersion9_0_2))
     return {9, 0, 2};
+  if (Features.test(FeatureISAVersion9_0_4))
+    return {9, 0, 4};
+  if (Features.test(FeatureISAVersion9_0_6))
+    return {9, 0, 6};
   if (Features.test(FeatureGFX9))
     return {9, 0, 0};