V4L/DVB (7374): Fix left-overs from the videobuf-dma-sg.c conversion to generic DMA

The dev element of the struct videobuf_queue is now of type struct device
implicitly. Fix left-over casts.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Reviewed-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c
index 12440b9..75b5810 100644
--- a/drivers/media/video/cx88/cx88-core.c
+++ b/drivers/media/video/cx88/cx88-core.c
@@ -219,7 +219,7 @@
 	videobuf_waiton(&buf->vb,0,0);
 	videobuf_dma_unmap(q, dma);
 	videobuf_dma_free(dma);
-	btcx_riscmem_free((struct pci_dev *)q->dev, &buf->risc);
+	btcx_riscmem_free(to_pci_dev(q->dev), &buf->risc);
 	buf->vb.state = VIDEOBUF_NEEDS_INIT;
 }