[media] coda/imx-vdoa: constify structs

As warned by checkpatch:

	WARNING: struct of_device_id should normally be const
	#318: FILE: drivers/media/platform/coda/imx-vdoa.c:318:
	+static struct of_device_id vdoa_dt_ids[] = {

So, constify structs.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
(cherry picked from commit d2fe28f)

drivers/media/platform/coda/imx-vdoa.c

@@ -315,13 +315,13 @@ static int vdoa_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct of_device_id vdoa_dt_ids[] = {
+static const struct of_device_id vdoa_dt_ids[] = {
 	{ .compatible = "fsl,imx6q-vdoa" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, vdoa_dt_ids);
 
-static struct platform_driver vdoa_driver = {
+static const struct platform_driver vdoa_driver = {
 	.probe		= vdoa_probe,
 	.remove		= vdoa_remove,
 	.driver		= {