[media] media: platform: exynos4-is: 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>
Signed-off-by: NKamil Debski <k.debski@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/exynos4-is/media-dev.c

@@ -1451,7 +1451,7 @@ static int fimc_md_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_device_id fimc_driver_ids[] __always_unused = {
+static const struct platform_device_id fimc_driver_ids[] __always_unused = {
 	{ .name = "s5p-fimc-md" },
 	{ },
 };