driver: macvlan: Remove duplicated IFF_UP condition check in macvlan_forward_source

The function macvlan_forward_source_one has already checked the flag
IFF_UP, so needn't check it outside in macvlan_forward_source too.
Signed-off-by: Gao Feng <gfree.wind@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/macvlan.c

@@ -400,8 +400,7 @@ static void macvlan_forward_source(struct sk_buff *skb,
 
 	hlist_for_each_entry_rcu(entry, h, hlist) {
 		if (ether_addr_equal_64bits(entry->addr, addr))
-			if (entry->vlan->dev->flags & IFF_UP)
-				macvlan_forward_source_one(skb, entry->vlan);
+			macvlan_forward_source_one(skb, entry->vlan);
 	}
 }