Bluetooth: Convert controller hdev->type to hdev->bus

The hdev->type is misnamed and should be actually hdev->bus instead. So
convert it now.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
index 2a00707..005919a 100644
--- a/drivers/bluetooth/bfusb.c
+++ b/drivers/bluetooth/bfusb.c
@@ -703,7 +703,7 @@
 
 	data->hdev = hdev;
 
-	hdev->type = HCI_USB;
+	hdev->bus = HCI_USB;
 	hdev->driver_data = data;
 	SET_HCIDEV_DEV(hdev, &intf->dev);