greybus: operation: fix typo in comment

Fix typo in comment.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/staging/greybus/operation.c

@@ -75,7 +75,7 @@ static DEFINE_SPINLOCK(gb_operations_lock);
  * valid value operation->errno can be set to is -EINPROGRESS,
  * indicating the request has been (or rather is about to be) sent.
  * At that point nobody should be looking at the result until the
- * reponse arrives.
+ * response arrives.
  *
  * The first time the result gets set after the request has been
  * sent, that result "sticks."  That is, if two concurrent threads