Implementation of the discussed changes

- remove usbd_edpt_xfer_abort
- rename tu_fifo_change_mode to tu_fifo_set_mode
- remove CFG_TUD_CDC_CLEAR_AT_CONNECTION definition
- remove auto fifo clear at connection event
- add tud_cdc_n_write_clear function

src/common/tusb_fifo.c

@@ -603,9 +603,11 @@ bool tu_fifo_clear(tu_fifo_t *f)
 
     @param[in]  f
                 Pointer to the FIFO buffer to manipulate
+    @param[in]  overwritable
+                Overwritable mode the fifo is set to
 */
 /******************************************************************************/
-bool tu_fifo_change_mode(tu_fifo_t *f, bool overwritable)
+bool tu_fifo_set_mode(tu_fifo_t *f, bool overwritable)
 {
   tu_fifo_lock(f);