crypto/mlx5: fix login release in probing and removal

crypto/mlx5: fix login release in probing and removal

The probe function creates DevX object named login and saves pointer to
it in priv structure.

The remove function releases first the priv structure and then releases
the login object.
However, the pointer to login object is field of priv structure, which
is invalid.

Release the login object and then release the priv structure.

Fixes: debb27ea3442 ("crypto/mlx5: create login object using DevX")
Cc: stable@dpdk.org
Signed-off-by: Michael Baum <michaelba@nvidia.com>
Reviewed-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>