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/csr1212.c b/drivers/ieee1394/csr1212.c
index 9f95337..5e38a68 100644
--- a/drivers/ieee1394/csr1212.c
+++ b/drivers/ieee1394/csr1212.c
@@ -84,7 +84,7 @@
 
 
 #define quads_to_bytes(_q) ((_q) * sizeof(u32))
-#define bytes_to_quads(_b) (((_b) + sizeof(u32) - 1) / sizeof(u32))
+#define bytes_to_quads(_b) DIV_ROUND_UP(_b, sizeof(u32))
 
 static void free_keyval(struct csr1212_keyval *kv)
 {