arch: Add missing #include <commonlib/helpers.h>

ALIGN((a), b) and ALIGN_UP(a, b) needs 'helpers.h'

Change-Id: I029c7c5cbb19c7e69997b3d84f929cb61e8e2b23
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33657
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/arch/x86/tables.c

@@ -23,6 +23,7 @@
 #include <arch/pirq_routing.h>
 #include <arch/smp/mpspec.h>
 #include <arch/acpi.h>
+#include <commonlib/helpers.h>
 #include <string.h>
 #include <cbmem.h>
 #include <smbios.h>