reset: lantiq: use devm_reset_controller_register()

Use devm_reset_controller_register() for the reset controller
registration.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210517032648.2969609-1-yangyingliang@huawei.com


Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>