media: raspberrypi: cfe: Fix mapping of dmabuf buffers

When using buffers from DRM, DMA-API gives a warning about: "mapping sg
segment longer than device claims to support [len=307200] [max=65536]"

Add a call to vb2_dma_contig_set_max_seg_size() to tell the DMA-API
about the supported segment size (which is UINT_MAX).

Fixes: 6edb685abb2a ("media: raspberrypi: Add support for RP1-CFE")
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Tomi Valkeinen <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/platform/raspberrypi/rp1-cfe/cfe.c

···
 		goto err_cfe_put;
 	}
 
+	ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, UINT_MAX);
+	if (ret)
+		goto err_cfe_put;
+
 	/* TODO: Enable clock only when running. */
 	cfe->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(cfe->clk)) {