media: zero reservedX fields in media_v2_topology

The MEDIA_IOC_G_TOPOLOGY implementation did not zero the reservedX fields.
Fix this.

Found with v4l2-compliance.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/media-device.c

@@ -266,6 +266,7 @@ static long media_device_get_topology(struct media_device *mdev,
 		uentity++;
 	}
 	topo->num_entities = i;
+	topo->reserved1 = 0;
 
 	/* Get interfaces and number of interfaces */
 	i = 0;
@@ -301,6 +302,7 @@ static long media_device_get_topology(struct media_device *mdev,
 		uintf++;
 	}
 	topo->num_interfaces = i;
+	topo->reserved2 = 0;
 
 	/* Get pads and number of pads */
 	i = 0;
@@ -327,6 +329,7 @@ static long media_device_get_topology(struct media_device *mdev,
 		upad++;
 	}
 	topo->num_pads = i;
+	topo->reserved3 = 0;
 
 	/* Get links and number of links */
 	i = 0;
@@ -358,6 +361,7 @@ static long media_device_get_topology(struct media_device *mdev,
 		ulink++;
 	}
 	topo->num_links = i;
+	topo->reserved4 = 0;
 
 	return ret;
 }