acpi: Fill fadt->century based on Kconfig

Change-Id: I916f19e022633b316fbc0c6bf38bbd58228412be
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56218
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lance Zhao
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/acpi/acpi.c

@@ -26,6 +26,7 @@
 #include <types.h>
 #include <version.h>
 #include <commonlib/sort.h>
+#include <pc80/mc146818rtc.h>
 
 static acpi_rsdp_t *valid_rsdp(acpi_rsdp_t *rsdp);
 
@@ -1510,6 +1511,9 @@ void acpi_create_fadt(acpi_fadt_t *fadt, acpi_facs_t *facs, void *dsdt)
 
 	fadt->preferred_pm_profile = acpi_get_preferred_pm_profile();
 
+	if (CONFIG(USE_PC_CMOS_ALTCENTURY))
+		fadt->century = RTC_CLK_ALTCENTURY;
+
 	arch_fill_fadt(fadt);
 
 	acpi_fill_fadt(fadt);