[media] media: video: pvrusb2: fix memory leak

Use put_device() instead of kfree() because of device name leak.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Acked-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/pvrusb2/pvrusb2-sysfs.c

@@ -647,7 +647,7 @@ static void class_dev_create(struct pvr2_sysfs *sfp,
 	if (ret) {
 		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 			   "device_register failed");
-		kfree(class_dev);
+		put_device(class_dev);
 		return;
 	}