Method ValidateFdtHeader

src/include/kernel_fdt.hpp:664–670

* @brief 验证 FDT header * @return Expected */

   * @return Expected<void>
   */
  [[nodiscard]] auto ValidateFdtHeader() const -> Expected<void> {
    assert(fdt_header_ != nullptr && "fdt_header_ is null");
    if (fdt_check_header(fdt_header_) != 0) {
      return std::unexpected(Error(ErrorCode::kFdtInvalidHeader));
    }
    return {};
  }

  /**
   * @brief 按路径查找节点