clocksource/drivers/sun4i: Remove unnecessary (void*) conversions

Remove unnecessary void* type casting.

Signed-off-by: XU pengfei <xupengfei@nfschina.com>
Link: https://lore.kernel.org/r/20220720020735.3771-1-xupengfei@nfschina.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>