Bluetooth: hci_serdev: Fixed error space required before open paranethesis

Fixed error in space required before paranthesis
in drivers/bluetooth/hci_serdev.c

Signed-off-by: Jagdish Tirumala <t.jag587@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/hci_serdev.c

@@ -95,7 +95,7 @@ static void hci_uart_write_work(struct work_struct *work)
 			hci_uart_tx_complete(hu, hci_skb_pkt_type(skb));
 			kfree_skb(skb);
 		}
-	} while(test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state));
+	} while (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state));
 
 	clear_bit(HCI_UART_SENDING, &hu->tx_state);
 }