staging/android: remove len field from struct sync_fence_info

After removing driver_data struct sync_fence_info has now a fixed size,
thus it doesn't need any field to tell its size, it is already known.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index d527878..2ab0c20 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -486,8 +486,6 @@
 	if (size < sizeof(*info))
 		return -ENOMEM;
 
-	info->len = sizeof(*info);
-
 	strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),
 		sizeof(info->obj_name));
 	strlcpy(info->driver_name, fence->ops->get_driver_name(fence),
@@ -498,7 +496,7 @@
 		info->status = 0;
 	info->timestamp_ns = ktime_to_ns(fence->timestamp);
 
-	return info->len;
+	return sizeof(*info);
 }
 
 static long sync_file_ioctl_fence_info(struct sync_file *sync_file,