Staging: most: aim-v4l2: constify v4l2_file_operations structures

Check for v4l2_file_operations structures that are only stored in the
fops field of video_device structures. As this field is constant, so
v4l2_file_operations structures having this property can also be
declared constant.
Done using coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct v4l2_file_operations i@p = {...};

@ok1@
identifier r1.i;
position p;
struct video_device x;
@@
x.fops=&i@p;

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

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct v4l2_file_operations i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct v4l2_file_operations i;

File size before:
   text	   data	    bss	    dec	    hex	filename
   5608	    160	      4	   5772	   168c
drivers/staging/most/aim-v4l2/video.o

File size after:
   text	   data	    bss	    dec	    hex	filename
   5696	     96	      4	   5796	   16a4
drivers/staging/most/aim-v4l2/video.o
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/aim-v4l2/video.c

@@ -369,7 +369,7 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
 	return 0;
 }
 
-static struct v4l2_file_operations aim_fops = {
+static const struct v4l2_file_operations aim_fops = {
 	.owner      = THIS_MODULE,
 	.open       = aim_vdev_open,
 	.release    = aim_vdev_close,