IEEE1394(r1155): Get rid of another user of round_up_to_page().

drivers/ieee1394/iso.c

@@ -91,7 +91,7 @@ static struct hpsb_iso* hpsb_iso_common_init(struct hpsb_host *host, enum hpsb_i
 	iso->irq_interval = irq_interval;
 	iso->dma_mode = dma_mode;
 	dma_region_init(&iso->data_buf);
-	iso->buf_size = round_up_to_page(data_buf_size);
+	iso->buf_size = PAGE_ALIGN(data_buf_size);
 	iso->buf_packets = buf_packets;
 	iso->pkt_dma = 0;
 	iso->first_packet = 0;