[media] v4l: tvp5150: Compile tvp5150_link_setup out if !CONFIG_MEDIA_CONTROLLER

The function is only referenced as a handler in the tvp5150_sd_media_ops
structure, which is only used when CONFIG_MEDIA_CONTROLLER is set. Don't
define the function and the structure when the configuration option is
unset to avoid an unused function warning.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/tvp5150.c

@@ -1013,11 +1013,11 @@ static int tvp5150_enum_frame_size(struct v4l2_subdev *sd,
 			Media entity ops
  ****************************************************************************/
 
+#ifdef CONFIG_MEDIA_CONTROLLER
 static int tvp5150_link_setup(struct media_entity *entity,
 			      const struct media_pad *local,
 			      const struct media_pad *remote, u32 flags)
 {
-#ifdef CONFIG_MEDIA_CONTROLLER
 	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
 	struct tvp5150 *decoder = to_tvp5150(sd);
 	int i;
@@ -1034,7 +1034,6 @@ static int tvp5150_link_setup(struct media_entity *entity,
 	decoder->input = i;
 
 	tvp5150_selmux(sd);
-#endif
 
 	return 0;
 }
@@ -1042,6 +1041,7 @@ static int tvp5150_link_setup(struct media_entity *entity,
 static const struct media_entity_operations tvp5150_sd_media_ops = {
 	.link_setup = tvp5150_link_setup,
 };
+#endif
 
 /****************************************************************************
 			I2C Command