net: fix vlan_get_size to include vlan_flags size

Fix vlan_get_size to include vlan->flags.  Currently, the
size of the vlan flags is not included in the nlmsg size.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/8021q/vlan_netlink.c b/net/8021q/vlan_netlink.c
index 343146e..a915048 100644
--- a/net/8021q/vlan_netlink.c
+++ b/net/8021q/vlan_netlink.c
@@ -169,6 +169,7 @@
 	struct vlan_dev_info *vlan = vlan_dev_info(dev);
 
 	return nla_total_size(2) +	/* IFLA_VLAN_ID */
+	       sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */
 	       vlan_qos_map_size(vlan->nr_ingress_mappings) +
 	       vlan_qos_map_size(vlan->nr_egress_mappings);
 }