V4L/DVB (6252): Adapt drivers to use the newer videobuf modules

PCI-dependent videobuf_foo methods were renamed as videobuf_pci_foo.

Also, videobuf_dmabuf is now part of videobuf-dma-sg private struct.
So, to access it, a subroutine call is needed.

This patch renames all occurences of those function calls to be
consistent with the video-buf split.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
http://thread.gmane.org/gmane.comp.video.video4linux/34978/focus=34981
Reviewed-by: Ricardo Cerqueira <v4l@cerqueira.org>
diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c
index 7161548..85609b4 100644
--- a/drivers/media/video/cx88/cx88-core.c
+++ b/drivers/media/video/cx88/cx88-core.c
@@ -213,10 +213,12 @@
 void
 cx88_free_buffer(struct videobuf_queue *q, struct cx88_buffer *buf)
 {
+	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+
 	BUG_ON(in_interrupt());
 	videobuf_waiton(&buf->vb,0,0);
-	videobuf_dma_unmap(q, &buf->vb.dma);
-	videobuf_dma_free(&buf->vb.dma);
+	videobuf_dma_unmap(q, dma);
+	videobuf_dma_free(dma);
 	btcx_riscmem_free((struct pci_dev *)q->dev, &buf->risc);
 	buf->vb.state = STATE_NEEDS_INIT;
 }