Bluetooth: Fix a typo in Kconfig

'internface' has an extra 'n'.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/Kconfig

@@ -216,7 +216,7 @@ config BT_HCIUART_RTL
 	select BT_RTL
 	help
 	  The Realtek protocol support enables Bluetooth HCI over 3-Wire
-	  serial port internface for Realtek Bluetooth controllers.
+	  serial port interface for Realtek Bluetooth controllers.
 
 	  Say Y here to compile support for Realtek protocol.