lib/coreboot_table.c: Use align macro

Change-Id: Ie874fe2c023157fad0adc021faa45e70822208da
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63711
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/lib/coreboot_table.c

@@ -37,9 +37,7 @@ static struct lb_header *lb_table_init(unsigned long addr)
 {
 	struct lb_header *header;
 
-	/* 16 byte align the address */
+	addr = ALIGN_UP(addr, 16);
-	addr += 15;
-	addr &= ~15;
 
 	header = (void *)addr;
 	header->signature[0] = 'L';