PM: sleep: Update struct wakeup_source documentation

The kerneldoc comment for struct wakeup_source has become outdated,
so fix that.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/pm_wakeup.h

@@ -36,7 +36,7 @@ struct wake_irq;
  * @expire_count: Number of times the wakeup source's timeout has expired.
  * @wakeup_count: Number of times the wakeup source might abort suspend.
  * @active: Status of the wakeup source.
- * @has_timeout: The wakeup source has been activated with a timeout.
+ * @autosleep_enabled: Autosleep is active, so update @prevent_sleep_time.
  */
 struct wakeup_source {
 	const char 		*name;