radv/gfx9: remove some leftover gfx6 descriptor setup.
We set this later in the non-gfx9 path, just remove these bits from here. Reviewed-by:Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Cc: "17.2" <mesa-stable@lists.freedesktop.org> Signed-off-by:
Dave Airlie <airlied@redhat.com> (cherry picked from commit fc600eb9)