media: i2c: rdacm20: Constify static structs

The only usage of rdacm20_video_ops is to assign it to the video field
in the v4l2_subdev_ops struct which is a pointer to const,  and the only
usage of rdacm20_subdev_ops is to pass its address to
v4l2_i2c_subdev_init() which accepts a pointer to const. Make them const
to allow the compiler to put them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Acked-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/i2c/rdacm20.c

@@ -435,7 +435,7 @@ static int rdacm20_get_fmt(struct v4l2_subdev *sd,
 	return 0;
 }
 
-static struct v4l2_subdev_video_ops rdacm20_video_ops = {
+static const struct v4l2_subdev_video_ops rdacm20_video_ops = {
 	.s_stream	= rdacm20_s_stream,
 };
 
@@ -445,7 +445,7 @@ static const struct v4l2_subdev_pad_ops rdacm20_subdev_pad_ops = {
 	.set_fmt	= rdacm20_get_fmt,
 };
 
-static struct v4l2_subdev_ops rdacm20_subdev_ops = {
+static const struct v4l2_subdev_ops rdacm20_subdev_ops = {
 	.video		= &rdacm20_video_ops,
 	.pad		= &rdacm20_subdev_pad_ops,
 };