arch/arm/cpu: use ALIGN_UP instead of ALIGN for better readability

Change-Id: Id0e281ece0a647721c18402029cd6980f75d5908
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33631
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

src/arch/arm/cpu.c

@@ -39,7 +39,7 @@ struct cpu_info *cpu_info(void)
 	"feature, make sure you add the proper assertions " \
 	"(and maybe consider revising the whole thing to work closer to what " \
 	"arm64 is doing now)."
-	uintptr_t addr = ALIGN((uintptr_t)__builtin_frame_address(0),
+	uintptr_t addr = ALIGN_UP((uintptr_t)__builtin_frame_address(0),
 		CONFIG_STACK_SIZE);
 	addr -= sizeof(struct cpu_info);
 	return (void *)addr;