add new tusb_int_handler(rhport, in_isr) as common irq handler

update tusb_init() to take rhport and role, defined as macro with optional argument for backward compatible

src/host/usbh.c

@@ -459,7 +459,7 @@ bool tuh_task_event_ready(void) {
     int main(void)
     {
       application_init();
-      tusb_init();
+      tusb_init(0, TUSB_ROLE_HOST);
 
       while(1) // the mainloop
       {