[media] media: rc: constify usb_device_id

usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c
index 6784cb9..6bfc248 100644
--- a/drivers/media/rc/redrat3.c
+++ b/drivers/media/rc/redrat3.c
@@ -186,7 +186,7 @@
 } __packed;
 
 /* table of devices that work with this driver */
-static struct usb_device_id redrat3_dev_table[] = {
+static const struct usb_device_id redrat3_dev_table[] = {
 	/* Original version of the RedRat3 */
 	{USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3USB_PRODUCT_ID)},
 	/* Second Version/release of the RedRat3 - RetRat3-II */