caif-hsi: Add missing return in error path

Fix a missing return, causing access to freed memory.
Signed-off-by: NSjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/caif/caif_hsi.c

@@ -1178,6 +1178,7 @@ int cfhsi_probe(struct platform_device *pdev)
 		dev_err(&ndev->dev, "%s: Registration error: %d.\n",
 			__func__, res);
 		free_netdev(ndev);
+		return -ENODEV;
 	}
 	/* Add CAIF HSI device to list. */
 	spin_lock(&cfhsi_list_lock);