Bluetooth: Cleanup formatting and coding style

Fix some warnings and one error reported by checkpatch.pl:
- lines longer than 80 characters are wrapped
- empty lines inserted to separate variable declarations from the actual
  code
- line break inserted after if (...)

Co-developed-by: Thomas Röthenbacher <thomas.roethenbacher@fau.de>
Signed-off-by: Thomas Röthenbacher <thomas.roethenbacher@fau.de>
Signed-off-by: Fabian Schindlatz <fabian.schindlatz@fau.de>
Cc: linux-kernel@i4.cs.fau.de
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/bpa10x.c

@@ -359,7 +359,8 @@ static int bpa10x_set_diag(struct hci_dev *hdev, bool enable)
 	return 0;
 }
 
-static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *id)
+static int bpa10x_probe(struct usb_interface *intf,
+			const struct usb_device_id *id)
 {
 	struct bpa10x_data *data;
 	struct hci_dev *hdev;