Underlying IPSec Multi buffer library implements DOCSIS specification, so this commit adds support for this new feature, which combines AES-CBC for full AES blocks (16 bytes) and AES-CFB for last runt block (less than 16 bytes). Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com> Acked-by: Declan Doherty <declan.doherty@intel.com>