Add a custom USB driver for ARM (#2750)

* 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

tmk_core/protocol/chibios.mk

@@ -5,6 +5,7 @@ CHIBIOS_DIR = $(PROTOCOL_DIR)/chibios
 SRC += $(CHIBIOS_DIR)/usb_main.c
 SRC += $(CHIBIOS_DIR)/main.c
 SRC += usb_descriptor.c
+SRC += $(CHIBIOS_DIR)/usb_driver.c
 
 VPATH += $(TMK_PATH)/$(PROTOCOL_DIR)
 VPATH += $(TMK_PATH)/$(CHIBIOS_DIR)