percpu: Use ALIGN macro instead of hand coding alignment calculation

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

mm/percpu.c

@@ -720,8 +720,7 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved)
 	if (unlikely(align < 2))
 		align = 2;
 
-	if (unlikely(size & 1))
-		size++;
+	size = ALIGN(size, 2);
 
 	if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE)) {
 		WARN(true, "illegal size (%zu) or align (%zu) for "