bonding: use the correct size for _simple_hash()

Clearly it should be the size of ->ip_dst here.
Although this is harmless, but it still reads odd.
Signed-off-by: NWANG Cong <amwang@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_alb.c

@@ -604,7 +604,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
 
 	_lock_rx_hashtbl(bond);
 
-	hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_src));
+	hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
 	client_info = &(bond_info->rx_hashtbl[hash_index]);
 
 	if (client_info->assigned) {