Merge remote-tracking branch 'upstream/master' into edpt_ISO_xfer

Conflicts:
	src/common/tusb_fifo.h
	src/osal/osal_none.h

src/common/tusb_fifo.c

@@ -808,6 +808,8 @@ bool tu_fifo_clear(tu_fifo_t *f)
 {
   tu_fifo_lock(f);
   f->rd_idx = f->wr_idx = 0;
+  f->max_pointer_idx = 2*f->depth-1;
+  f->non_used_index_space = UINT16_MAX - f->max_pointer_idx;
   tu_fifo_unlock(f);
 
   return true;