mac8390: fix build with NET_POLL_CONTROLLER

Fix the build for CONFIG_NET_POLL_CONTROLLER that I broke with
217cbfa8 ("mac8390: fix regression
caused during net_device_ops conversion").
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/mac8390.c

@@ -489,7 +489,7 @@ static const struct net_device_ops mac8390_netdev_ops = {
 	.ndo_set_mac_address 	= eth_mac_addr,
 	.ndo_change_mtu		= eth_change_mtu,
 #ifdef CONFIG_NET_POLL_CONTROLLER
-	.ndo_poll_controller	= ei_poll,
+	.ndo_poll_controller	= __ei_poll,
 #endif
 };