Here add maintainer information for HiSilicon GPIO driver.
Signed-off-by: NLuo Jiaxing <luojiaxing@huawei.com>
Link: https://lore.kernel.org/r/1607934255-52544-3-git-send-email-luojiaxing@huawei.com
[Dropped some dead code when applying]
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>