reset: hisilicon: check return value of reset_controller_register()

The newly added hisilicon reset driver missed the subsystem-wide
fixup by commit d1f15aa0 ("reset: check return value of
reset_controller_register()").  So fix it now.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>