hwmon: ibmpex: remove unnecessary (void*) conversions

Pointer variables of void * type do not require type cast.

Signed-off-by: XU pengfei <xupengfei@nfschina.com>
Link: https://lore.kernel.org/r/20230111043605.3726-1-xupengfei@nfschina.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>