net: ethernet: altera: TSE: fix error return code in altera_tse_probe()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: fef2998203e1 ("net: altera: tse: convert to phylink")
Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Sun Ke <[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

···
 				       priv->phy_iface, &alt_tse_phylink_ops);
 	if (IS_ERR(priv->phylink)) {
 		dev_err(&pdev->dev, "failed to create phylink\n");
+		ret = PTR_ERR(priv->phylink);
 		goto err_init_phy;
 	}