[media] v4l: omap4iss: Don't initialize fields to 0 manually

The iss_device structure is allocated with kzalloc, there's no need to
initialize its fields to 0 explicitly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/omap4iss/iss.c

@@ -1306,7 +1306,6 @@ static int iss_probe(struct platform_device *pdev)
 
 	iss->dev = &pdev->dev;
 	iss->pdata = pdata;
-	iss->ref_count = 0;
 
 	iss->raw_dmamask = DMA_BIT_MASK(32);
 	iss->dev->dma_mask = &iss->raw_dmamask;