drivers/net/eql.c: Fix a dev leakage.

After dev_get_by_name(), we should follow a dev_put().

Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/eql.c

@@ -542,6 +542,8 @@ static int eql_s_slave_cfg(struct net_device *dev, slave_config_t __user *scp)
 	}
 	spin_unlock_bh(&eql->queue.lock);
 
+	dev_put(slave_dev);
+
 	return ret;
 }