Bluetooth: Simplify hci_uart_tty_close logic

This patch cleans up and reduces indentation in the hci_uart_tty_close
function.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

drivers/bluetooth/hci_ldisc.c

@@ -286,15 +286,17 @@ static int hci_uart_tty_open(struct tty_struct *tty)
 static void hci_uart_tty_close(struct tty_struct *tty)
 {
 	struct hci_uart *hu = (void *)tty->disc_data;
+	struct hci_dev *hdev;
 
 	BT_DBG("tty %p", tty);
 
 	/* Detach from the tty */
 	tty->disc_data = NULL;
 
-	if (hu) {
-		struct hci_dev *hdev = hu->hdev;
+	if (!hu)
+		return;
 
+	hdev = hu->hdev;
 	if (hdev)
 		hci_uart_close(hdev);
 
@@ -307,7 +309,6 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 	}
 
 	kfree(hu);
-	}
 }
 
 /* hci_uart_tty_wakeup()