media: radio/wl128x: remove unnecessary (void*) conversions

The void * type pointer does not need to be cast.

Signed-off-by: Zhou jie <zhoujie@nfschina.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/radio/wl128x/fmdrv_common.c

@@ -1442,7 +1442,7 @@ static long fm_st_receive(void *arg, struct sk_buff *skb)
 {
 	struct fmdev *fmdev;
 
-	fmdev = (struct fmdev *)arg;
+	fmdev = arg;
 
 	if (skb == NULL) {
 		fmerr("Invalid SKB received from ST\n");