regulator: hi6xxx: Switch to SPDX identifier

Convert HiSilicon hi6xxx PMIC drivers to SPDX identifier.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/hi6421-regulator.c

-/*
- * Device driver for regulators in Hi6421 IC
- *
- * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
- *              http://www.hisilicon.com
- * Copyright (c) <2013-2014> Linaro Ltd.
- *              http://www.linaro.org
- *
- * Author: Guodong Xu <guodong.xu@linaro.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// Device driver for regulators in Hi6421 IC
+//
+// Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
+//              http://www.hisilicon.com
+// Copyright (c) <2013-2014> Linaro Ltd.
+//              http://www.linaro.org
+//
+// Author: Guodong Xu <guodong.xu@linaro.org>
 
 #include <linux/slab.h>
 #include <linux/device.h>

drivers/regulator/hi6421v530-regulator.c

-/*
- * Device driver for regulators in Hi6421V530 IC
- *
- * Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
- *              http://www.hisilicon.com
- * Copyright (c) <2017> Linaro Ltd.
- *              http://www.linaro.org
- *
- * Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
- *         Guodong Xu <guodong.xu@linaro.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// Device driver for regulators in Hi6421V530 IC
+//
+// Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
+//              http://www.hisilicon.com
+// Copyright (c) <2017> Linaro Ltd.
+//              http://www.linaro.org
+//
+// Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
+//         Guodong Xu <guodong.xu@linaro.org>
 
 #include <linux/mfd/hi6421-pmic.h>
 #include <linux/module.h>

drivers/regulator/hi655x-regulator.c

-/*
- * Device driver for regulators in Hi655x IC
- *
- * Copyright (c) 2016 Hisilicon.
- *
- * Authors:
- * Chen Feng <puck.chen@hisilicon.com>
- * Fei  Wang <w.f@huawei.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// Device driver for regulators in Hi655x IC
+//
+// Copyright (c) 2016 Hisilicon.
+//
+// Authors:
+// Chen Feng <puck.chen@hisilicon.com>
+// Fei  Wang <w.f@huawei.com>
 
 #include <linux/bitops.h>
 #include <linux/device.h>