rename usbd_init() to tud_init()

src/device/usbd.c

@@ -276,7 +276,7 @@ bool tud_remote_wakeup(void)
 //--------------------------------------------------------------------+
 // USBD Task
 //--------------------------------------------------------------------+
-bool usbd_init (void)
+bool tud_init (void)
 {
   TU_LOG2("USBD init\r\n");