Add feature flag for symmetric sessionless support,
so it can be checked by applications.
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Adam Dybkowski <adamx.dybkowski@intel.com>
Tested-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>