NETLINK_TYPE_FLAG is NLA_FLAG.
This new type will be used in NLA_FLAG for example
IFLA_VXLAN_GBP and IFLA_VXLAN_REMCSUM_NOPARTIAL
NETLINK_TYPE_U32, /* NLA_U32 */
NETLINK_TYPE_U64, /* NLA_U64 */
NETLINK_TYPE_STRING, /* NLA_STRING */
NETLINK_TYPE_U32, /* NLA_U32 */
NETLINK_TYPE_U64, /* NLA_U64 */
NETLINK_TYPE_STRING, /* NLA_STRING */
+ NETLINK_TYPE_FLAG, /* NLA_FLAG */
NETLINK_TYPE_IN_ADDR,
NETLINK_TYPE_ETHER_ADDR,
NETLINK_TYPE_CACHE_INFO,
NETLINK_TYPE_IN_ADDR,
NETLINK_TYPE_ETHER_ADDR,
NETLINK_TYPE_CACHE_INFO,