net: liquidio: lio_vf_main: Remove unnecessary (void*) conversions

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

Signed-off-by: wuych <yunchuan@nfschina.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>