RSS HASH should be updated and queried by application, Add related ops ('.rss_hash_update', '.rss_hash_conf_get') for DCF. Because DCF doesn't support configure RSS HASH, only HASH key can be updated within ops '.rss_hash_update'. Signed-off-by: Steve Yang <stevex.yang@intel.com> Signed-off-by: Kevin Liu <kevinx.liu@intel.com> Acked-by: Qi Zhang <qi.z.zhang@intel.com>