netxen: build fix for INET=n

When CONFIG_INET is disabled, netxen has a build failure:

netxen_nic_main.c:(.text+0x118fd1): undefined reference to `netxen_config_indev_addr'

so make that function just an empty stub when CONFIG_INET=n.
(not "inline" since that conflicts with other declarations of it)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/netxen/netxen_nic_main.c

@@ -2450,6 +2450,10 @@ static struct notifier_block	netxen_netdev_cb = {
 static struct notifier_block netxen_inetaddr_cb = {
 	.notifier_call = netxen_inetaddr_event,
 };
+#else
+static void
+netxen_config_indev_addr(struct net_device *dev, unsigned long event)
+{ }
 #endif
 
 static struct pci_driver netxen_driver = {