[media] marvell-cam: use S/G DMA by default

Scatter/gather DMA mode works nicely on this platform and is clearly the
best way of doing things.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/marvell-ccic/mmp-driver.c

@@ -180,7 +180,7 @@ static int mmpcam_probe(struct platform_device *pdev)
 	mcam->dev = &pdev->dev;
 	mcam->use_smbus = 0;
 	mcam->chip_id = V4L2_IDENT_ARMADA610;
-	mcam->buffer_mode = B_vmalloc;  /* Switch to dma */
+	mcam->buffer_mode = B_DMA_sg;
 	spin_lock_init(&mcam->dev_lock);
 	/*
 	 * Get our I/O memory.