sh_eth: use DIV_ROUND_UP() in sh_eth_soft_swap()

When initializing 'maxp' in sh_eth_soft_swap(), the buffer length needs
to be rounded  up -- that's just asking for DIV_ROUND_UP()!
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/sh_eth.c

@@ -464,7 +464,7 @@ static void sh_eth_soft_swap(char *src, int len)
 {
 #ifdef __LITTLE_ENDIAN
 	u32 *p = (u32 *)src;
-	u32 *maxp = p + ((len + sizeof(u32) - 1) / sizeof(u32));
+	u32 *maxp = p + DIV_ROUND_UP(len, sizeof(u32));
 
 	for (; p < maxp; p++)
 		*p = swab32(*p);