sky2: netpoll on port 0 only

Netpoll will only work on port 0 because of the restrictive
relationship between NAPI and netpoll.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/sky2.c

@@ -3995,6 +3995,7 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
 	dev->tx_timeout = sky2_tx_timeout;
 	dev->watchdog_timeo = TX_WATCHDOG;
 #ifdef CONFIG_NET_POLL_CONTROLLER
+	if (port == 0)
 		dev->poll_controller = sky2_netpoll;
 #endif