Using a small number of sessions results in rte_mempool_create call
with cache_size > n, which fails. There is no need to cache the elements,
as there is no performance impact.
Fixes: 501c0a3b14c3 ("app/crypto-perf: limit number of sessions")
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
f05511bc85