[PATCH] enp2611: don't check netif_running() in link status timer

Even after an interface has gone !netif_running(), we still want to
catch the 'carrier went down' event for our internal bookkeeping.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>