bonding: bond_get_size() returns wrong size

There is an extra semi-colon so bond_get_size() doesn't return the
correct value.

Fixes: ec76aa4985 ('bonding: add Netlink support active_slave option')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Veaceslav Falico <vfalico@redhat.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_netlink.c

@@ -82,8 +82,8 @@ static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
 
 static size_t bond_get_size(const struct net_device *bond_dev)
 {
-	return nla_total_size(sizeof(u8));	/* IFLA_BOND_MODE */
+	return nla_total_size(sizeof(u8)) +	/* IFLA_BOND_MODE */
-		+ nla_total_size(sizeof(u32));	/* IFLA_BOND_ACTIVE_SLAVE */
+		nla_total_size(sizeof(u32));	/* IFLA_BOND_ACTIVE_SLAVE */
 }
 
 static int bond_fill_info(struct sk_buff *skb,