i2c: hix5hd2: use the correct HiSilicon copyright

s/Hisilicon/HiSilicon/g.
It should use capital S, according to
https://www.hisilicon.com/en/terms-of-use.
Signed-off-by: Hao Fang <fanghao11@huawei.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-hix5hd2.c

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) 2014 Linaro Ltd.
- * Copyright (c) 2014 Hisilicon Limited.
+ * Copyright (c) 2014 HiSilicon Limited.
  *
  * Now only support 7 bit address.
  */