dt-bindings: reset: convert Hisilicon reset controller bindings to json-schema

Convert the Hisilicon reset controller binding to DT schema format using
json-schema.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>