media: staging: max96712: Constify static v4l2_subdev_ops

The only usage of max96712_subdev_ops is to pass its address to
v4l2_i2c_subdev_init() which takes a pointer to const struct
v4l2_subdev_ops as argument. Make it const to allow the compiler to put
it in read-only memory.

Link: https://lore.kernel.org/linux-media/20211127094945.27985-1-rikard.falkeborn@gmail.comSigned-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: Niklas S\xF6derlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/max96712/max96712.c

@@ -250,7 +250,7 @@ static const struct v4l2_subdev_pad_ops max96712_pad_ops = {
 	.set_fmt = max96712_get_pad_format,
 };
 
-static struct v4l2_subdev_ops max96712_subdev_ops = {
+static const struct v4l2_subdev_ops max96712_subdev_ops = {
 	.video = &max96712_video_ops,
 	.pad = &max96712_pad_ops,
 };