Bluetooth: Use devm_kzalloc in btsdio.c file

devm_kzalloc() eliminates the need to free memory explicitly
thereby saving some cleanup code.

Signed-off-by: Sachin Kamat <[e-mail]>
Acked-by: Marcel Holtmann <[e-mail]>
Signed-off-by: Gustavo Padovan <[e-mail]>

drivers/bluetooth/btsdio.c

···
 		tuple = tuple->next;
 	}
 
-	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	data = devm_kzalloc(&func->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 
···
 	skb_queue_head_init(&data->txq);
 
 	hdev = hci_alloc_dev();
-	if (!hdev) {
-		kfree(data);
+	if (!hdev)
 		return -ENOMEM;
-	}
 
 	hdev->bus = HCI_SDIO;
 	hci_set_drvdata(hdev, data);
···
 	err = hci_register_dev(hdev);
 	if (err < 0) {
 		hci_free_dev(hdev);
-		kfree(data);
 		return err;
 	}
 
···
 	hci_unregister_dev(hdev);
 
 	hci_free_dev(hdev);
-	kfree(data);
 }
 
 static struct sdio_driver btsdio_driver = {