FL_PREPARING_ERASE
ret = this->wait(mtd, FL_PREPARING_ERASE);
if (state != FL_READING && state != FL_PREPARING_ERASE)
if (state == FL_PREPARING_ERASE && !(interrupt & ONENAND_INT_ERASE)) {
if (state == FL_RESETTING || state == FL_PREPARING_ERASE ||
case FL_PREPARING_ERASE: