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

v4l2_subdev_{core/pad/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_video_ops i@p = {...};

@ok1@
identifier r1.i;
position p;
struct v4l2_subdev_ops obj;
@@
obj.video=&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_video_ops i;

File sizes before:
  text	   data	    bss	    dec	    hex	filename
   7810	    736	     16	   8562	   2172	drivers/media/i2c/mt9p031.o
   9652	    736	     24	  10412	   28ac	drivers/media/i2c/mt9v032.o
   4613	    552	     20	   5185	   1441	drivers/media/i2c/noon010pc30.o
   2615	    552	      8	   3175	    c67	drivers/media/i2c/s5k6a3.o

File sizes after:
  text	   data	    bss	    dec	    hex	filename
   8322	    232	     16	   8570	   217a	drivers/media/i2c/mt9p031.o
  10164	    232	     24	  10420	   28b4	drivers/media/i2c/mt9v032.o
   4933	    232	     20	   5185	   1441	drivers/media/i2c/noon010pc30.o
   2935	    232	      8	   3175	    c67	drivers/media/i2c/s5k6a3.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/mt9p031.c

@@ -972,15 +972,15 @@ static int mt9p031_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
 	return mt9p031_set_power(subdev, 0);
 }
 
-static struct v4l2_subdev_core_ops mt9p031_subdev_core_ops = {
+static const struct v4l2_subdev_core_ops mt9p031_subdev_core_ops = {
 	.s_power        = mt9p031_set_power,
 };
 
-static struct v4l2_subdev_video_ops mt9p031_subdev_video_ops = {
+static const struct v4l2_subdev_video_ops mt9p031_subdev_video_ops = {
 	.s_stream       = mt9p031_s_stream,
 };
 
-static struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = {
+static const struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = {
 	.enum_mbus_code = mt9p031_enum_mbus_code,
 	.enum_frame_size = mt9p031_enum_frame_size,
 	.get_fmt = mt9p031_get_format,
@@ -989,7 +989,7 @@ static struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = {
 	.set_selection = mt9p031_set_selection,
 };
 
-static struct v4l2_subdev_ops mt9p031_subdev_ops = {
+static const struct v4l2_subdev_ops mt9p031_subdev_ops = {
 	.core   = &mt9p031_subdev_core_ops,
 	.video  = &mt9p031_subdev_video_ops,
 	.pad    = &mt9p031_subdev_pad_ops,

drivers/media/i2c/mt9v032.c

@@ -935,15 +935,15 @@ static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
 	return mt9v032_set_power(subdev, 0);
 }
 
-static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
+static const struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
 	.s_power	= mt9v032_set_power,
 };
 
-static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
+static const struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
 	.s_stream	= mt9v032_s_stream,
 };
 
-static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
+static const struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
 	.enum_mbus_code = mt9v032_enum_mbus_code,
 	.enum_frame_size = mt9v032_enum_frame_size,
 	.get_fmt = mt9v032_get_format,
@@ -952,7 +952,7 @@ static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
 	.set_selection = mt9v032_set_selection,
 };
 
-static struct v4l2_subdev_ops mt9v032_subdev_ops = {
+static const struct v4l2_subdev_ops mt9v032_subdev_ops = {
 	.core	= &mt9v032_subdev_core_ops,
 	.video	= &mt9v032_subdev_video_ops,
 	.pad	= &mt9v032_subdev_pad_ops,

drivers/media/i2c/noon010pc30.c

@@ -664,13 +664,13 @@ static const struct v4l2_subdev_core_ops noon010_core_ops = {
 	.log_status	= noon010_log_status,
 };
 
-static struct v4l2_subdev_pad_ops noon010_pad_ops = {
+static const struct v4l2_subdev_pad_ops noon010_pad_ops = {
 	.enum_mbus_code	= noon010_enum_mbus_code,
 	.get_fmt	= noon010_get_fmt,
 	.set_fmt	= noon010_set_fmt,
 };
 
-static struct v4l2_subdev_video_ops noon010_video_ops = {
+static const struct v4l2_subdev_video_ops noon010_video_ops = {
 	.s_stream	= noon010_s_stream,
 };
 

drivers/media/i2c/s5k6a3.c

@@ -165,7 +165,7 @@ static int s5k6a3_get_fmt(struct v4l2_subdev *sd,
 	return 0;
 }
 
-static struct v4l2_subdev_pad_ops s5k6a3_pad_ops = {
+static const struct v4l2_subdev_pad_ops s5k6a3_pad_ops = {
 	.enum_mbus_code	= s5k6a3_enum_mbus_code,
 	.get_fmt	= s5k6a3_get_fmt,
 	.set_fmt	= s5k6a3_set_fmt,
@@ -266,11 +266,11 @@ static int s5k6a3_s_power(struct v4l2_subdev *sd, int on)
 	return ret;
 }
 
-static struct v4l2_subdev_core_ops s5k6a3_core_ops = {
+static const struct v4l2_subdev_core_ops s5k6a3_core_ops = {
 	.s_power = s5k6a3_s_power,
 };
 
-static struct v4l2_subdev_ops s5k6a3_subdev_ops = {
+static const struct v4l2_subdev_ops s5k6a3_subdev_ops = {
 	.core = &s5k6a3_core_ops,
 	.pad = &s5k6a3_pad_ops,
 };