Instead of storing some crypto operation flags, such as operation status, as enumerations, store them as uint8_t, for memory efficiency. Also, reserve extra 5 bytes in the crypto operation, for future additions. Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com> Acked-by: Declan Doherty <declan.doherty@intel.com> Acked-by: Akhil Goyal <akhil.goyal@nxp.com> Acked-by: Fiona Trahe <fiona.trahe@intel.com>