Added custom function for video device release functionality in tw686x driver

index 3a06c000..cabc4f89 100644
@@ -1151,18 +1151,32 @@ void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
 	}
 }
 
+void tw686x_video_device_release(struct tw686x_video_channel *vc) {
+
+	struct tw686x_dev *dev = vc->dev;
+
+	unsigned int ch;
+
+	for (ch = 0; ch < max_channels(dev); ch++) {
+		struct tw686x_video_channel *vc = &dev->video_channels[ch];
+
+	}
+	
+	dev->dma_ops->free(vc,0);
+	
+	video_device_release((struct video_device*)dev);
+
+}
+
 void tw686x_video_free(struct tw686x_dev *dev)
 {
-	unsigned int ch, pb;
+	unsigned int ch;
 
 	for (ch = 0; ch < max_channels(dev); ch++) {
 		struct tw686x_video_channel *vc = &dev->video_channels[ch];
 
 		video_unregister_device(vc->device);
 
-		if (dev->dma_ops->free)
-			for (pb = 0; pb < 2; pb++)
-				dev->dma_ops->free(vc, pb);
 	}
 }
 

@@ -1277,7 +1291,6 @@ int tw686x_video_init(struct tw686x_dev *dev)
 		snprintf(vdev->name, sizeof(vdev->name), "%s video", dev->name);
 		vdev->fops = &tw686x_video_fops;
 		vdev->ioctl_ops = &tw686x_video_ioctl_ops;
-		vdev->release = video_device_release;
 		vdev->v4l2_dev = &dev->v4l2_dev;
 		vdev->queue = &vc->vidq;
 		vdev->tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50;