qp_detach_session function was using the attach_session_t
function prototype, instead of detach_session_t.
Since both of them have the same parameters, there were
no compilation issues, but it is not consistent.
Fixes: d816fdea557c ("cryptodev: add API to associate session with queue pair")
Cc: stable@dpdk.org
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>