XXXX introduce drv_sectohz

*** 739,749 ****
          mutex_init(&tmrp->t_mutex, NULL, MUTEX_DRIVER, NULL);
  
          /*
           * determine default timeout value
           */
!         ghd_HZ = drv_usectohz(1000000);
          if (ticks == 0)
                  ticks = scsi_watchdog_tick * ghd_HZ;
          tmrp->t_ticks = ticks;
  
  
--- 739,749 ----
          mutex_init(&tmrp->t_mutex, NULL, MUTEX_DRIVER, NULL);
  
          /*
           * determine default timeout value
           */
!         ghd_HZ = drv_sectohz(1);
          if (ticks == 0)
                  ticks = scsi_watchdog_tick * ghd_HZ;
          tmrp->t_ticks = ticks;