cifs: use SPDX-Licence-Identifier

Add SPDX license identifier and replace license boilerplate.
Corrects various checkpatch errors with the older format for
noting the LGPL license.

Signed-off-by: Steve French <stfrench@microsoft.com>
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index e811f2d..3d55cb2 100644
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
 /*
  *   fs/cifs/fscache.h - CIFS filesystem cache interface definitions
  *
  *   Copyright (c) 2010 Novell, Inc.
  *   Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
  *
- *   This library is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU Lesser General Public License as published
- *   by the Free Software Foundation; either version 2.1 of the License, or
- *   (at your option) any later version.
- *
- *   This library is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU Lesser General Public License for more details.
- *
- *   You should have received a copy of the GNU Lesser General Public License
- *   along with this library; if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _CIFS_FSCACHE_H
 #define _CIFS_FSCACHE_H