Some IPv6 prefix related protocol header fields are defined in this patch, so that we can use prefix instead of full IPv6 address for RSS. Ref https://tools.ietf.org/html/rfc6052. Signed-off-by: Junfeng Guo <junfeng.guo@intel.com> Signed-off-by: Qi Zhang <qi.z.zhang@intel.com> Acked-by: Beilei Xing <beilei.xing@intel.com>