regulator: sy8824x: use c++style for the comment block near SPDX

Update the entire comment block to be C++ style so it looks consistent.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20190829143749.4b42bc65@xhacker.debianSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/sy8824x.c

 // SPDX-License-Identifier: GPL-2.0
-/*
- * SY8824C/SY8824E regulator driver
- *
- * Copyright (C) 2019 Synaptics Incorporated
- *
- * Author: Jisheng Zhang <jszhang@kernel.org>
- */
+//
+// SY8824C/SY8824E regulator driver
+//
+// Copyright (C) 2019 Synaptics Incorporated
+//
+// Author: Jisheng Zhang <jszhang@kernel.org>
 
 #include <linux/module.h>
 #include <linux/i2c.h>