media: imx: capture: constify vb2_ops structures

These vb2_ops structures are only stored in the ops field of a
vb2_queue structure, which is declared as const.  Thus the vb2_ops
structures themselves can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct vb2_ops i@p = { ... };

@ok@
identifier r.i;
struct vb2_queue e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct vb2_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct vb2_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/imx/imx-media-capture.c

@@ -62,7 +62,7 @@ struct capture_priv {
 /* In bytes, per queue */
 #define VID_MEM_LIMIT	SZ_64M
 
-static struct vb2_ops capture_qops;
+static const struct vb2_ops capture_qops;
 
 /*
  * Video ioctls follow
@@ -503,7 +503,7 @@ static void capture_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irqrestore(&priv->q_lock, flags);
 }
 
-static struct vb2_ops capture_qops = {
+static const struct vb2_ops capture_qops = {
 	.queue_setup	 = capture_queue_setup,
 	.buf_init        = capture_buf_init,
 	.buf_prepare	 = capture_buf_prepare,