AMDGPU: Fix gfx801 features

gfx801 has 1/2 rate F64, Fast F32 FMA

Differential Revision: https://reviews.llvm.org/D36981


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311694 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed