USB Device HW driver and core API

Modules
	USB hardware driver
	USB device core
	Contains core API.

Compile-time control macros
#define	USBD_PINS_REMAP
	Remap USB pins for uC with low pin count packages.
#define	USBD_SOF_DISABLED
	Disables SOF handling.
#define	USBD_VBUS_DETECT
	Enables Vbus detection for L4/F4 driver.
#define	USBD_DP_PORT
	DP pullup port for F103/F303 driver.
#define	USBD_DP_PIN
	DP pullup pin for F103/F303 driver.
#define	USBD_SOF_OUT
	Enables SOF output pin for F4 OTGFS.
#define	USBD_PRIMARY_OTGHS
	Sets OTGHS as primary interface for F4.
#define	USBD_USE_EXT_ULPI
	Enables external ULPI interface for OTGHS.
#define	USB_PMA_SIZE
	PMA memoty size in bytes. Adjust this for the devices that shares PMA memory with CAN in case of both USB and CAN in use to avoid data corruption.

Detailed Description