[media] drivers: media: i2c: ml86v7667: constify v4l2_subdev_* structures

v4l2_subdev_{core/video}_ops structures are stored in the
fields of the v4l2_subdev_ops structure which are of type const.
Also, v4l2_subdev_ops structure is passed to a function
having its argument of type const. As these structures are never
modified, so declare them as const.
Done using Coccinelle: (One of the scripts used)

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct v4l2_subdev_ops i@p = {...};

@ok1@
identifier r1.i;
position p;
@@
v4l2_i2c_subdev_init(...,&i@p)

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct v4l2_subdev_ops i;

File size before:
  text	   data	    bss	    dec	    hex	filename
   2732	    608	      8	   3348	    d14	drivers/media/i2c/ml86v7667.o

File size after:
  text	   data	    bss	    dec	    hex	filename
   3100	    232	      8	   3340	    d0c	drivers/media/i2c/ml86v7667.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/ml86v7667.c

@@ -290,7 +290,7 @@ static const struct v4l2_ctrl_ops ml86v7667_ctrl_ops = {
 	.s_ctrl = ml86v7667_s_ctrl,
 };
 
-static struct v4l2_subdev_video_ops ml86v7667_subdev_video_ops = {
+static const struct v4l2_subdev_video_ops ml86v7667_subdev_video_ops = {
 	.g_std = ml86v7667_g_std,
 	.s_std = ml86v7667_s_std,
 	.querystd = ml86v7667_querystd,
@@ -304,14 +304,14 @@ static const struct v4l2_subdev_pad_ops ml86v7667_subdev_pad_ops = {
 	.set_fmt = ml86v7667_fill_fmt,
 };
 
-static struct v4l2_subdev_core_ops ml86v7667_subdev_core_ops = {
+static const struct v4l2_subdev_core_ops ml86v7667_subdev_core_ops = {
 #ifdef CONFIG_VIDEO_ADV_DEBUG
 	.g_register = ml86v7667_g_register,
 	.s_register = ml86v7667_s_register,
 #endif
 };
 
-static struct v4l2_subdev_ops ml86v7667_subdev_ops = {
+static const struct v4l2_subdev_ops ml86v7667_subdev_ops = {
 	.core = &ml86v7667_subdev_core_ops,
 	.video = &ml86v7667_subdev_video_ops,
 	.pad = &ml86v7667_subdev_pad_ops,