The struct acpi_platform_list and function acpi_match_platform_list() defined in include/linux/acpi.h are available only when CONFIG_ACPI is enabled. Add protection to fix the build issues with !CONFIG_ACPI. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Link: https://lore.kernel.org/r/20210609015511.3955-1-shawn.guo@linaro.org Signed-off-by: Will Deacon <will@kernel.org>