usbnet: dm9601: apply usbnet_link_change

Use usbnet_link_change to handle link change centrally.

Cc: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index 174e5ec..2dbb946 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -524,12 +524,7 @@
 
 	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);
 	}
 }