Fix for IDE Menu option "NO USB" @ F_CPU <= 16MHz LC/T3.xteensy4-core
| #if defined(USB_SERIAL) || defined(USB_SERIAL_HID) | #if defined(USB_SERIAL) || defined(USB_SERIAL_HID) | ||||
| usb_serial_class Serial; | usb_serial_class Serial; | ||||
| #elif (USB_DISABLED) | |||||
| usb_serial_class Serial; | |||||
| #else | #else | ||||
| usb_seremu_class Serial; | usb_seremu_class Serial; | ||||
| #endif | #endif |