powerpc/pseries/dlpar: Remove unnecessary cast to kfree()

Remove unnecassary cast in the argument to kfree().
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200708072228.30776-1-vulab@iscas.ac.cn

arch/powerpc/platforms/pseries/dlpar.c

@@ -389,7 +389,7 @@ static void pseries_hp_work_fn(struct work_struct *work)
 	handle_dlpar_errorlog(hp_work->errlog);
 
 	kfree(hp_work->errlog);
-	kfree((void *)work);
+	kfree(work);
 }
 
 void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog)