NVPTX: Make the llvm.nvvm.shfl intrinsics and builtin names consistent

The intrinsics here use nvvm, but the builtins and tablegen variable
names were using ptx. Stick to the modern names here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274662 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed