crom_crc_valid
if (!crom_crc_valid((uint32_t *)reg, dir->crc_len, dir->crc)) {
if (!crom_crc_valid((uint32_t *)&rootdir->entry[0], root_len,
if (!crom_crc_valid((uint32_t *)&udir->entry[0], udir_len,
if (!crom_crc_valid((uint32_t *)&dir->entry[0], dir_len, dir->crc)) {
if (!crom_crc_valid((uint32_t *)&udir->entry[0], udir_len, udir->crc)) {
int crom_crc_valid(uint32_t *data, int len, uint16_t expected);