media: radio: make video_device const

Make these const as they are only used in a copy operation.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/radio/radio-tea5764.c

@@ -414,7 +414,7 @@ static const struct v4l2_ioctl_ops tea5764_ioctl_ops = {
 };
 
 /* V4L2 interface */
-static struct video_device tea5764_radio_template = {
+static const struct video_device tea5764_radio_template = {
 	.name		= "TEA5764 FM-Radio",
 	.fops           = &tea5764_fops,
 	.ioctl_ops 	= &tea5764_ioctl_ops,

drivers/media/radio/radio-wl1273.c

@@ -1982,7 +1982,7 @@ static const struct v4l2_ioctl_ops wl1273_ioctl_ops = {
 	.vidioc_log_status      = wl1273_fm_vidioc_log_status,
 };
 
-static struct video_device wl1273_viddev_template = {
+static const struct video_device wl1273_viddev_template = {
 	.fops			= &wl1273_fops,
 	.ioctl_ops		= &wl1273_ioctl_ops,
 	.name			= WL1273_FM_DRIVER_NAME,

drivers/media/radio/si4713/radio-platform-si4713.c

@@ -135,7 +135,7 @@ static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = {
 };
 
 /* radio_si4713_vdev_template - video device interface */
-static struct video_device radio_si4713_vdev_template = {
+static const struct video_device radio_si4713_vdev_template = {
 	.fops			= &radio_si4713_fops,
 	.name			= "radio-si4713",
 	.release		= video_device_release_empty,

drivers/media/radio/wl128x/fmdrv_v4l2.c

@@ -509,7 +509,7 @@ static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
 };
 
 /* V4L2 RADIO device parent structure */
-static struct video_device fm_viddev_template = {
+static const struct video_device fm_viddev_template = {
 	.fops = &fm_drv_fops,
 	.ioctl_ops = &fm_drv_ioctl_ops,
 	.name = FM_DRV_NAME,