sb/intel/{i82371eb,i82801dx}/fadt.c: Use macro for iapc_boot_arch

Change-Id: Ie5e44be06da8a84c9cff42e07af1a7387faad533
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44522
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/southbridge/intel/i82801dx/fadt.c b/src/southbridge/intel/i82801dx/fadt.c
index e1746e4..9239383 100644
--- a/src/southbridge/intel/i82801dx/fadt.c
+++ b/src/southbridge/intel/i82801dx/fadt.c
@@ -46,7 +46,7 @@
 	fadt->day_alrm = 0xd;
 	fadt->mon_alrm = 0x00;
 	fadt->century = 0x00;
-	fadt->iapc_boot_arch = 0x03;
+	fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042;
 
 	fadt->flags |= ACPI_FADT_WBINVD | ACPI_FADT_C1_SUPPORTED |
 			ACPI_FADT_C2_MP_SUPPORTED | ACPI_FADT_SLEEP_BUTTON |