update(port): add sof support

Signed-off-by: sakumisu <1203593632@qq.com>

common/usb_dc.h

@@ -138,6 +138,11 @@ int usbd_ep_start_read(uint8_t busid, const uint8_t ep, uint8_t *data, uint32_t
 
 /* usb dcd irq callback, called by user */
 
+/**
+ * @brief Usb sof irq callback.
+ */
+void usbd_event_sof_handler(uint8_t busid);
+
 /**
  * @brief Usb connect irq callback.
  */