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

ALIGN and ALIGN_UP needs 'helpers.h

Change-Id: Ia18f69b58bae6d841d800dc38745ff27f51cec46
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33659
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/drivers/amd/agesa/mtrr_fixme.c

@@ -14,6 +14,7 @@
 #include <arch/cpu.h>
 #include <cbmem.h>
 #include <console/console.h>
+#include <commonlib/helpers.h>
 #include <cpu/amd/mtrr.h>
 #include <cpu/cpu.h>
 #include <cpu/x86/cache.h>