net: altera_tse: release phylink resources in tse_shutdown()

Call phylink_disconnect_phy() in tse_shutdown() to release the
resources occupied by phylink_of_phy_connect() in the tse_open().

Fixes: fef2998203e1 ("net: altera: tse: convert to phylink")
Signed-off-by: Liu Jian <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Paolo Abeni <[e-mail]>

drivers/net/ethernet/altera/altera_tse_main.c

···
 	int ret;
 
 	phylink_stop(priv->phylink);
+	phylink_disconnect_phy(priv->phylink);
 	netif_stop_queue(dev);
 	napi_disable(&priv->napi);