netlink: Use PAGE_ALIGNED macro

Use PAGE_ALIGNED(...) instead of IS_ALIGNED(..., PAGE_SIZE).

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 1b38f7f..ce82722a 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -374,7 +374,7 @@
 
 		if ((int)req->nm_block_size <= 0)
 			return -EINVAL;
-		if (!IS_ALIGNED(req->nm_block_size, PAGE_SIZE))
+		if (!PAGE_ALIGNED(req->nm_block_size))
 			return -EINVAL;
 		if (req->nm_frame_size < NL_MMAP_HDRLEN)
 			return -EINVAL;