swconfig: "swconfig list" shows devices in reverse order

Boards that have more than one swconfig enabled switch will show the devices in
reverse order when call swconfig list. Fix this by using list_add_tail().

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 43106

target/linux/generic/files/drivers/net/phy/swconfig.c

@@ -1079,7 +1079,7 @@ register_switch(struct switch_dev *dev, struct net_device *netdev)
 	/* fill device name */
 	snprintf(dev->devname, IFNAMSIZ, SWCONFIG_DEVNAME, i);
 
-	list_add(&dev->dev_list, &swdevs);
+	list_add_last(&dev->dev_list, &swdevs);
 	swconfig_unlock();
 
 	err = swconfig_create_led_trigger(dev);