According to Section 5.2.10 of ACPI Specification, FACS is optional
in reduced hardware model. Enable the detection for "Hardware-reduced
ACPI support only" build (CONFIG_ACPI_REDUCED_HARDWARE_ONLY=y) also.

Link: https://github.com/acpica/acpica/commit/ee53ed6b5452612bb44af542b68d605f8b2b1104Signed-off-by: Jiaqing Zhao <jiaqing.zhao@linux.intel.com>
Link: https://patch.msgid.link/20240827025821.2099068-2-jiaqing.zhao@linux.intel.comSigned-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>