ipv6: ndisc: remove redundant check for !dev->addr_len

send_sllao is already initialized with the value of dev->addr_len

Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Signed-off-by: NThomas Graf <tgraf@suug.ch>
Acked-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ndisc.c

@@ -610,8 +610,6 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
 		}
 	}
 #endif
-	if (!dev->addr_len)
-		send_sllao = 0;
 	if (send_sllao)
 		optlen += ndisc_opt_addr_space(dev);