net/mlx5: fix typo in comment

Spelling mistake (triple letters) in comment.
Detected with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/main.c

@@ -1769,7 +1769,7 @@ static int mlx5_try_fast_unload(struct mlx5_core_dev *dev)
 	}
 
 	/* Panic tear down fw command will stop the PCI bus communication
-	 * with the HCA, so the health polll is no longer needed.
+	 * with the HCA, so the health poll is no longer needed.
 	 */
 	mlx5_drain_health_wq(dev);
 	mlx5_stop_health_poll(dev, false);