net/mlx5e: Don't notify HW when filling the edge of ICO SQ

We are going to do this a couple of steps ahead anyway.

Fixes: d3c9bc27 ("net/mlx5e: Added ICO SQs")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>