implement msc device class

usbd auto stall control for not supported return from class control request
usbd implement xfer isr callback mechanism
DCD
- implement dcd multiple qtd support
- dcd dcd_pipe_stall
- implement dcd_pipe_queue_xfer
- xfer_complete_isr
- flush control endpoint if received new setup while previous transfer is not complete
change msc_cmd_block_wrapper_t flags field to dir
force full speed for easy testing

NOTEs: somehow unable to get endpoint IN interrupt with ioc

demos/host/src/msc_app.h

@@ -46,9 +46,6 @@
 #ifndef _TUSB_MSC_APP_H_
 #define _TUSB_MSC_APP_H_
 
-#include <stdint.h>
-#include <stdbool.h>
-
 #include "boards/board.h"
 #include "tusb.h"