libavb: Update SPDX tag style

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/lib/libavb/avb_vbmeta_image.c b/lib/libavb/avb_vbmeta_image.c
index 2acca7d..a7e2322 100644
--- a/lib/libavb/avb_vbmeta_image.c
+++ b/lib/libavb/avb_vbmeta_image.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: MIT
 /*
  * Copyright (C) 2016 The Android Open Source Project
- *
- * SPDX-License-Identifier:	MIT
  */
 
 #include "avb_vbmeta_image.h"