media: v4l: omap3isp: make v4l2_file_operations const

Make this const as it is only stored in a const field of a
video_device structure.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/omap3isp/ispvideo.c

@@ -1403,7 +1403,7 @@ static int isp_video_mmap(struct file *file, struct vm_area_struct *vma)
 	return vb2_mmap(&vfh->queue, vma);
 }
 
-static struct v4l2_file_operations isp_video_fops = {
+static const struct v4l2_file_operations isp_video_fops = {
 	.owner = THIS_MODULE,
 	.unlocked_ioctl = video_ioctl2,
 	.open = isp_video_open,