ieee1394: Use DIV_ROUND_UP

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
index b166b35..2012869 100644
--- a/drivers/ieee1394/eth1394.c
+++ b/drivers/ieee1394/eth1394.c
@@ -1361,7 +1361,7 @@
 		hdr->ff.dgl = dgl;
 		adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF];
 	}
-	return (dg_size + adj_max_payload - 1) / adj_max_payload;
+	return DIV_ROUND_UP(dg_size, adj_max_payload);
 }
 
 static unsigned int ether1394_encapsulate(struct sk_buff *skb,