payloads,src: Replace ALIGN(x, a) by ALIGN_UP(x, a) for clarity

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I80f3d2c90c58daa62651f6fd635c043b1ce38b84
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68255
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/lib/malloc.c

@@ -26,7 +26,7 @@ void *memalign(size_t boundary, size_t size)
 	MALLOCDBG("%s Enter, boundary %zu, size %zu, free_mem_ptr %p\n",
 		__func__, boundary, size, free_mem_ptr);
 
-	free_mem_ptr = (void *)ALIGN((unsigned long)free_mem_ptr, boundary);
+	free_mem_ptr = (void *)ALIGN_UP((unsigned long)free_mem_ptr, boundary);
 
 	p = free_mem_ptr;
 	free_mem_ptr += size;