scsi: ufs: sysfs: Use the correct style for SPDX License Identifier

This patch corrects the SPDX License Identifier style in header file
related to UFS Host Controller. It assigns explicit block comment to the
SPDX License Identifier.

Changes made by using a script provided by Joe Perches here:
https://lkml.org/lkml/2019/2/7/46.

Link: https://lore.kernel.org/r/5ca6287665fe52d8f40062e0eab8561d2b7a5b40.1577511720.git.nishadkamdar@gmail.comSuggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufs-sysfs.h

-/* SPDX-License-Identifier: GPL-2.0
- * Copyright (C) 2018 Western Digital Corporation
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2018 Western Digital Corporation
  */
 
 #ifndef __UFS_SYSFS_H__