rtnl: use nla_put_u64_64bit()

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/uapi/linux/if_link.h

@@ -666,6 +666,7 @@ enum {
 	IFLA_VF_STATS_TX_BYTES,
 	IFLA_VF_STATS_BROADCAST,
 	IFLA_VF_STATS_MULTICAST,
+	IFLA_VF_STATS_PAD,
 	__IFLA_VF_STATS_MAX,
 };