media: usb: make video_device const

Make these const as they are only used during a copy operation.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/usb/cpia2/cpia2_v4l.c

@@ -1075,7 +1075,7 @@ static const struct v4l2_file_operations cpia2_fops = {
 	.mmap		= cpia2_mmap,
 };
 
-static struct video_device cpia2_template = {
+static const struct video_device cpia2_template = {
 	/* I could not find any place for the old .initialize initializer?? */
 	.name =		"CPiA2 Camera",
 	.fops =		&cpia2_fops,