In case big number need to be freed, data it contains should
also be cleared before especially if it is critical data like
private keys.
Fixes: 3e9d6bd447fb ("crypto/openssl: add RSA and mod asym operations")
Cc: stable@dpdk.org
Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>