net/mlx5: remove ineffective increment in hairpin split

net/mlx5: remove ineffective increment in hairpin split

The flow_hairpin_split function defines a pointer called addr that
points to the list of items.
When the function wants to progress in the list, it adds the size of an
item to the pointer.

At the end of the function, it precedes the pointer one more time even
though it is not used afterwards. In fact, this line is unaffected and
the operation of the function would have been no different without it.

Remove the line where the pointer is preceded unnecessarily.

Fixes: d85c7b5ea59f ("net/mlx5: split hairpin flows")
Cc: stable@dpdk.org
Signed-off-by: Michael Baum <michaelba@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>