radv: properly align the fence and EOP bug VA on GFX9
If alignement is 0, offets returned by radv_cmd_buffer_upload_alloc() are always 0. These two virtual addresses were pointing at the same location. Cc: 18.3 19.0 <mesa-stable@lists.freedesktop.org> Signed-off-by:Samuel Pitoiset <samuel.pitoiset@gmail.com> Reviewed-by:
Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> (cherry picked from commit c2a14869)