XXXX introduce drv_sectohz

*** 1446,1456 ****
                          *state = bd->d_state;
                          mutex_exit(&bd->d_statemutex);
                          break;
                  }
  
!                 when = drv_usectohz(1000000);
                  if (cv_reltimedwait_sig(&bd->d_statecv, &bd->d_statemutex,
                      when, TR_CLOCK_TICK) == 0) {
                          mutex_exit(&bd->d_statemutex);
                          return (EINTR);
                  }
--- 1446,1456 ----
                          *state = bd->d_state;
                          mutex_exit(&bd->d_statemutex);
                          break;
                  }
  
!                 when = drv_sectohz(1);
                  if (cv_reltimedwait_sig(&bd->d_statecv, &bd->d_statemutex,
                      when, TR_CLOCK_TICK) == 0) {
                          mutex_exit(&bd->d_statemutex);
                          return (EINTR);
                  }