staging: vc04_services: mmal-vchiq: fix typo in comment

Correct typo from 'witin' to 'within' in comment.
Signed-off-by: Jongwoo Han <jongwooo.han@gmail.com>
Link: https://lore.kernel.org/r/20230130164250.51877-1-jongwooo.han@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c

@@ -245,7 +245,7 @@ static void event_to_host_cb(struct vchiq_mmal_instance *instance,
 /* workqueue scheduled callback
  *
  * we do this because it is important we do not call any other vchiq
- * sync calls from witin the message delivery thread
+ * sync calls from within the message delivery thread
  */
 static void buffer_work_cb(struct work_struct *work)
 {