Add minor adjustments to support SHA256 HMAC:
- extend maximum key length to match SHA256 HMAC
- add SHA256 HMAC parameters and configuration string
- add SHA256 HMAC to inbound and outbound cases
Signed-off-by: Zbigniew Bodek <zbigniew.bodek@caviumnetworks.com>
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>