In Gaudi, the user can't execute scalar load_and_exe on external queue
because it can be a security hole. The driver doesn't parse the commands
being loaded and it can be msg_prot, which the user isn't allowed to use.
Reviewed-by: NTomer Tayar <ttayar@habana.ai>
Signed-off-by: NOded Gabbay <oded.gabbay@gmail.com>