boot: Add tlv query for protected region

                            bool prot);

int bootutil_tlv_iter_next(struct image_tlv_iter *it, uint32_t *off,

                           uint16_t *len, uint16_t *type);

int bootutil_tlv_iter_is_prot(struct image_tlv_iter *it, uint32_t off);

int32_t bootutil_get_img_security_cnt(struct image_header *hdr,

                                      const struct flash_area *fap,

    return 1;

}

/*

 * Return if a TLV entry is in the protected area.

 *

 * @param it The image TLV iterator struct

 * @param off The offset of the entry to check.

 *

 * @return 0 if this TLV iterator entry is not protected.

 *         1 if this TLV iterator entry is in the protected region

 *         -1 if the iterator is invalid.

 */

int

bootutil_tlv_iter_is_prot(struct image_tlv_iter *it, uint32_t off)

{

    if (it == NULL || it->hdr == NULL || it->fap == NULL) {

        return -1;

    }

    return off < it->prot_end;

}