lpcmanager

Fixed CanFestival plugin and added -Wno-unused-function to remove warnings when compiling PLC application.
mbmrtu_cleanup();
rt_task_delete(&RTU_UART_task);
rt_task_join(&RTU_UART_task);
rt_task_delete(&RTU_task);
rt_task_join(&RTU_task);
rt_mutex_delete(&RTU_BuffMutex);
gpio_close(RTU_GPIO_dev);