XXXX introduce drv_sectohz

*** 1549,1559 ****
  
          /*
           * create a new timeout.
           */
          ac_hot_plug_timeout = timeout(ac_timeout, NULL,
!             drv_usectohz(ac_hot_plug_timeout_interval * 1000000));
  
          mutex_exit(&ac_hot_plug_mode_mutex);
          return (0);
  }
  
--- 1549,1559 ----
  
          /*
           * create a new timeout.
           */
          ac_hot_plug_timeout = timeout(ac_timeout, NULL,
!             drv_sectohz(ac_hot_plug_timeout_interval));
  
          mutex_exit(&ac_hot_plug_mode_mutex);
          return (0);
  }