Bluetooth: btwilink: Fix probe return value

Probe functions should return 0 on success. This driver's probe
returns the value returned by hci_register_dev(), which is the hci
index. This works for systems with only one hci device (id = 0) but
for systems where the btwilink device ends up with an id larger than
0, things will start to fall apart.

Make the probe function return 0 on success.

Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btwilink.c

@@ -310,7 +310,7 @@ static int bt_ti_probe(struct platform_device *pdev)
 	BT_DBG("HCI device registered (hdev %p)", hdev);
 
 	dev_set_drvdata(&pdev->dev, hst);
-	return err;
+	return 0;
 }
 
 static int bt_ti_remove(struct platform_device *pdev)