usbnet: dm9601: apply usbnet_link_change

Use usbnet_link_change to handle link change centrally.

Cc: Peter Korsgaard <[e-mail]>
Signed-off-by: Ming Lei <[e-mail]>
Acked-by: Peter Korsgaard <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/usb/dm9601.c

···
 
 	link = !!(buf[0] & 0x40);
 	if (netif_carrier_ok(dev->net) != link) {
-		if (link) {
-			netif_carrier_on(dev->net);
-			usbnet_defer_kevent (dev, EVENT_LINK_RESET);
-		}
-		else
-			netif_carrier_off(dev->net);
+		usbnet_link_change(dev, link, 1);
 		netdev_dbg(dev->net, "Link Status is: %d\n", link);
 	}
 }