HID: roccat: Drop cast

This patch removes the cast on data of type void* as it is not needed.
The following Coccinelle semantic patch was used for making the change:

@r@
expression x;
void* e;
type T;
identifier f;
@@

(
  *((T *)e)
|
  ((T *)x)[...]
|
  ((T *)x)->f
|
- (T *)
  e
)

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-roccat-lua.c

@@ -61,7 +61,7 @@ static ssize_t lua_sysfs_write(struct file *fp, struct kobject *kobj,
 		return -EINVAL;
 
 	mutex_lock(&lua->lua_lock);
-	retval = roccat_common2_send(usb_dev, command, (void *)buf, real_size);
+	retval = roccat_common2_send(usb_dev, command, buf, real_size);
 	mutex_unlock(&lua->lua_lock);
 
 	return retval ? retval : real_size;