mv643xx_eth: count handling a link event as one unit of napi work

Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/mv643xx_eth.c

@@ -2178,6 +2178,7 @@ static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
 		if (mp->work_link) {
 			mp->work_link = 0;
 			handle_link_event(mp);
+			work_done++;
 			continue;
 		}