pch_gbe: Fixed the issue on which PC was frozen when link was downed.

When a link was downed during network use,
there is an issue on which PC freezes.

This patch fixed this issue.
Signed-off-by: NToshiharu Okada <toshiharu-linux@dsn.okisemi.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/pch_gbe/pch_gbe_main.c

@@ -2195,7 +2195,7 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
 		/* If no Tx and not enough Rx work done,
 		 * exit the polling mode
 		 */
-		if ((work_done < budget) || !netif_running(netdev))
+		if (work_done < budget)
 			poll_end_flag = true;
 	}