V4L/DVB (7237): Convert videobuf-dma-sg to generic DMA API

videobuf-dma-sg does not need to depend on PCI. Switch it to using generic
DMA API, convert all affected drivers, relax Kconfig restriction, improve
compile-time type checking, fix some Coding Style violations while at it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/saa7134/saa7134-dvb.c b/drivers/media/video/saa7134/saa7134-dvb.c
index b55df48..eabc67d 100644
--- a/drivers/media/video/saa7134/saa7134-dvb.c
+++ b/drivers/media/video/saa7134/saa7134-dvb.c
@@ -899,8 +899,8 @@
 	dev->ts.nr_bufs    = 32;
 	dev->ts.nr_packets = 32*4;
 	dev->dvb.name = dev->name;
-	videobuf_queue_pci_init(&dev->dvb.dvbq, &saa7134_ts_qops,
-			    dev->pci, &dev->slock,
+	videobuf_queue_sg_init(&dev->dvb.dvbq, &saa7134_ts_qops,
+			    &dev->pci->dev, &dev->slock,
 			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
 			    V4L2_FIELD_ALTERNATE,
 			    sizeof(struct saa7134_buf),