[AMDGPU] rename vi-insts into gfx8-insts

Differential Revision: https://reviews.llvm.org/D60293

llvm-svn: 357792
diff --git a/clang/lib/Basic/Targets/AMDGPU.cpp b/clang/lib/Basic/Targets/AMDGPU.cpp
index c1f3fb6..4ce438c 100644
--- a/clang/lib/Basic/Targets/AMDGPU.cpp
+++ b/clang/lib/Basic/Targets/AMDGPU.cpp
@@ -150,7 +150,7 @@
     case GK_GFX803:
     case GK_GFX802:
     case GK_GFX801:
-      Features["vi-insts"] = true;
+      Features["gfx8-insts"] = true;
       Features["16-bit-insts"] = true;
       Features["dpp"] = true;
       Features["s-memrealtime"] = true;