[media] staging: media: omap4iss: Constify platform_device_id

The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/staging/media/omap4iss/iss.c

@@ -1489,7 +1489,7 @@ static int iss_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_device_id omap4iss_id_table[] = {
+static const struct platform_device_id omap4iss_id_table[] = {
 	{ "omap4iss", 0 },
 	{ },
 };