Revert "[media] Postpone the addition of MEDIA_IOC_G_TOPOLOGY"

Enable MEDIA_IOC_G_TOPOLOGY ioctl for Kernel 4.6.

This reverts commit be0270ec89e6b9b49de7e533dd1f3a89ad34d205.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 7dae0ac..4d1c13d 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -234,7 +234,6 @@
 	return ret;
 }
 
-#if 0 /* Let's postpone it to Kernel 4.6 */
 static long __media_device_get_topology(struct media_device *mdev,
 				      struct media_v2_topology *topo)
 {
@@ -390,7 +389,6 @@
 
 	return 0;
 }
-#endif
 
 static long media_device_ioctl(struct file *filp, unsigned int cmd,
 			       unsigned long arg)
@@ -424,14 +422,13 @@
 		mutex_unlock(&dev->graph_mutex);
 		break;
 
-#if 0 /* Let's postpone it to Kernel 4.6 */
 	case MEDIA_IOC_G_TOPOLOGY:
 		mutex_lock(&dev->graph_mutex);
 		ret = media_device_get_topology(dev,
 				(struct media_v2_topology __user *)arg);
 		mutex_unlock(&dev->graph_mutex);
 		break;
-#endif
+
 	default:
 		ret = -ENOIOCTLCMD;
 	}
@@ -480,9 +477,7 @@
 	case MEDIA_IOC_DEVICE_INFO:
 	case MEDIA_IOC_ENUM_ENTITIES:
 	case MEDIA_IOC_SETUP_LINK:
-#if 0 /* Let's postpone it to Kernel 4.6 */
 	case MEDIA_IOC_G_TOPOLOGY:
-#endif
 		return media_device_ioctl(filp, cmd, arg);
 
 	case MEDIA_IOC_ENUM_LINKS32: