reset: hi6220: allow to compile test driver on other architectures

Also remove the RESET_CONTROLLER dependency, this Kconfig file is
included inside the menuconfig already.

Cc: Chen Feng <puck.chen@hisilicon.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>