tlv_type_nvm
struct tlv_type_nvm *tlv_nvm;
while (idx < length - sizeof(struct tlv_type_nvm)) {
tlv_nvm = (struct tlv_type_nvm *)(data + idx);
if (length < idx + sizeof(struct tlv_type_nvm) + tag_len)
idx += sizeof(struct tlv_type_nvm) + tag_len;