V4L/DVB (3516): Make video_buf more generic

Video_buf were concerned to allow PCI devices to be used as
video capture devices. This patch extends video_buf features
by virtualizing pci-dependent functions and allowing other
type of devices to use it.
It is still DMA centric, although it may be used also by
devices that emulates scatter/gather behavior or a DMA device

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index a9fc269..f0ea9b5 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -90,7 +90,7 @@
 			   enum v4l2_field field)
 {
 	struct cx8802_dev *dev = q->priv_data;
-	return cx8802_buf_prepare(dev, (struct cx88_buffer*)vb,field);
+	return cx8802_buf_prepare(q, dev, (struct cx88_buffer*)vb,field);
 }
 
 static void dvb_buf_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
@@ -101,8 +101,7 @@
 
 static void dvb_buf_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
 {
-	struct cx8802_dev *dev = q->priv_data;
-	cx88_free_buffer(dev->pci, (struct cx88_buffer*)vb);
+	cx88_free_buffer(q, (struct cx88_buffer*)vb);
 }
 
 static struct videobuf_queue_ops dvb_qops = {