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/i82371eb/fadt.c b/src/southbridge/intel/i82371eb/fadt.c
index 9abe48c..5add01c 100644
--- a/src/southbridge/intel/i82371eb/fadt.c
+++ b/src/southbridge/intel/i82371eb/fadt.c
@@ -50,7 +50,8 @@
 	 * 2    0: VGA is ok to probe
 	 * 3    1: MSI are not supported
 	 */
-	fadt->iapc_boot_arch = 0xb;
+	fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042 |
+			       ACPI_FADT_MSI_NOT_SUPPORTED;
 	/*
 	 * bit  meaning
 	 * 0    WBINVD