[NETROM]: NET/ROM has no ARP

ARP over NET/ROM does not exist so it's obviously not implemented on any
NET/ROM stack, so the NET/ROM interfaces really should default to IFF_NOARP.

Signed-off-by: Ralf Baechle DL5RB <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/netrom/nr_dev.c

···
 	dev->set_mac_address    = nr_set_mac_address;
 
 	/* New-style flags. */
-	dev->flags		= 0;
+	dev->flags		= IFF_NOARP;
 
 	dev->get_stats 		= nr_get_stats;
 }