V4L/DVB (5156): Fix: dma free is being called with wrong arguments

Functions buffer_release() in bttv-driver.c and
vbi_buffer_release() in bttv-vbi.c are ending with:
      bttv_dma_free(&fh->cap,fh->btv,buf);
 
For vbi it seems to be wrong. Both functions should end with:
 
      bttv_dma_free(q,fh->btv,buf);
Thanks to Peter Schlaf <peter.schlaf@web.de> for pointing this.

Signed-off-by: Michael H. Schimek <mschimek@gmx.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/bt8xx/bttv-vbi.c b/drivers/media/video/bt8xx/bttv-vbi.c
index 754f66b..93e35de 100644
--- a/drivers/media/video/bt8xx/bttv-vbi.c
+++ b/drivers/media/video/bt8xx/bttv-vbi.c
@@ -224,7 +224,7 @@
 	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
 
 	dprintk("free %p\n",vb);
-	bttv_dma_free(&fh->cap,fh->btv,buf);
+	bttv_dma_free(q,fh->btv,buf);
 }
 
 struct videobuf_queue_ops bttv_vbi_qops = {