XXXX introduce drv_sectohz

*** 3110,3120 ****
                          ddi_put8(asy->asy_iohandle, asy->asy_ioaddr + LCR,
                              (val | SETBREAK));
                          mutex_exit(&asy->asy_excl_hi);
                          async->async_flags |= ASYNC_BREAK;
                          (void) timeout(async_restart, (caddr_t)async,
!                             drv_usectohz(1000000)/4);
                          freemsg(bp);
                          return; /* wait for this to finish */
  
                  case M_DELAY:
                          /*
--- 3110,3120 ----
                          ddi_put8(asy->asy_iohandle, asy->asy_ioaddr + LCR,
                              (val | SETBREAK));
                          mutex_exit(&asy->asy_excl_hi);
                          async->async_flags |= ASYNC_BREAK;
                          (void) timeout(async_restart, (caddr_t)async,
!                             drv_sectohz(1) / 4);
                          freemsg(bp);
                          return; /* wait for this to finish */
  
                  case M_DELAY:
                          /*
*** 3577,3587 ****
                                  ddi_put8(asy->asy_iohandle,
                                      asy->asy_ioaddr + LCR,
                                      (val | SETBREAK));
                                  mutex_exit(&asy->asy_excl_hi);
                                  (void) timeout(async_restart, (caddr_t)async,
!                                     drv_usectohz(1000000)/4);
                          } else {
                                  DEBUGCONT1(ASY_DEBUG_OUT,
                                      "async%d_ioctl: wait for flush.\n",
                                      instance);
                                  mutex_enter(&asy->asy_excl_hi);
--- 3577,3587 ----
                                  ddi_put8(asy->asy_iohandle,
                                      asy->asy_ioaddr + LCR,
                                      (val | SETBREAK));
                                  mutex_exit(&asy->asy_excl_hi);
                                  (void) timeout(async_restart, (caddr_t)async,
!                                     drv_sectohz(1) / 4);
                          } else {
                                  DEBUGCONT1(ASY_DEBUG_OUT,
                                      "async%d_ioctl: wait for flush.\n",
                                      instance);
                                  mutex_enter(&asy->asy_excl_hi);