[media] media: platform: vivid: vivid-osd: Remove unnecessary cast to kfree

Remove an unnecassary cast in the argument to kfree.

Found using Coccinelle. The semantic patch used to find this is as follows:

//<smpl>
@@
type T;
expression *f;
@@

- kfree((T *)(f));
+ kfree(f);
//</smpl>

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/vivid/vivid-osd.c

@@ -360,7 +360,7 @@ void vivid_fb_release_buffers(struct vivid_dev *dev)
 
 	/* Release pseudo palette */
 	kfree(dev->fb_info.pseudo_palette);
-	kfree((void *)dev->video_vbase);
+	kfree(dev->video_vbase);
 }
 
 /* Initialize the specified card */