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/bootmem.c

@@ -228,7 +228,7 @@ void *bootmem_allocate_buffer(size_t size)
 	}
 
 	/* 4KiB alignment. */
-	size = ALIGN(size, 4096);
+	size = ALIGN_UP(size, 4096);
 	region = NULL;
 	memranges_each_entry(r, &bootmem) {
 		if (range_entry_base(r) >= max_addr)