* Copy Chibios serial_usb_driver into the chibios/protocol
It's renamed to usb_driver to avoid name conflicts
* Make the usb driver compile
* Disable ChibiOS serial usb driver for all keyboards
* Change usb_main to use QMKUSBDriver
* Initialize the usb driver buffers
* Add support for fixed size queues
* Fix USB driver initialization
* Don't transfer an empty packet for fixed size streams
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