bi/va: Add instructions required for KHR_shader_atomic_int64

Add 64-bit atomic instructions for bifrost/valhall

Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Eric R. Smith <eric.smith@collabora.com>
Signed-off-by: Ashley Smith <ashley.smith@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35789>
3 files changed