hwmon: (occ) Fix license headers

Files have inconsistent license information.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/occ/common.c

-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright IBM Corp 2019
 
 #include <linux/device.h>
 #include <linux/hwmon.h>

drivers/hwmon/occ/common.h

-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright IBM Corp 2019 */
 
 #ifndef OCC_COMMON_H
 #define OCC_COMMON_H

drivers/hwmon/occ/p8_i2c.c

-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright IBM Corp 2019
 
 #include <linux/device.h>
 #include <linux/errno.h>

drivers/hwmon/occ/p9_sbe.c

-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright IBM Corp 2019
 
 #include <linux/device.h>
 #include <linux/errno.h>

drivers/hwmon/occ/sysfs.c

-// SPDX-License-Identifier: GPL-2.0
-/*
- * OCC hwmon driver sysfs interface
- *
- * Copyright (C) IBM Corporation 2018
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright IBM Corp 2019
 
 #include <linux/bitops.h>
 #include <linux/device.h>