5042 stop using deprecated atomic functions

*** 201,211 ****
                  case DTRACE_VTIME_ACTIVE_TNF:
                          panic("DTrace virtual time already enabled");
                          /*NOTREACHED*/
                  }
  
!         } while (cas32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_disable(void)
--- 201,211 ----
                  case DTRACE_VTIME_ACTIVE_TNF:
                          panic("DTrace virtual time already enabled");
                          /*NOTREACHED*/
                  }
  
!         } while (atomic_cas_32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_disable(void)
*** 228,238 ****
                  case DTRACE_VTIME_INACTIVE_TNF:
                          panic("DTrace virtual time already disabled");
                          /*NOTREACHED*/
                  }
  
!         } while (cas32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_enable_tnf(void)
--- 228,238 ----
                  case DTRACE_VTIME_INACTIVE_TNF:
                          panic("DTrace virtual time already disabled");
                          /*NOTREACHED*/
                  }
  
!         } while (atomic_cas_32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_enable_tnf(void)
*** 255,265 ****
                  case DTRACE_VTIME_INACTIVE_TNF:
                          panic("TNF already active");
                          /*NOTREACHED*/
                  }
  
!         } while (cas32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_disable_tnf(void)
--- 255,265 ----
                  case DTRACE_VTIME_INACTIVE_TNF:
                          panic("TNF already active");
                          /*NOTREACHED*/
                  }
  
!         } while (atomic_cas_32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_disable_tnf(void)
*** 282,292 ****
                  case DTRACE_VTIME_INACTIVE:
                          panic("TNF already inactive");
                          /*NOTREACHED*/
                  }
  
!         } while (cas32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_switch(kthread_t *next)
--- 282,292 ----
                  case DTRACE_VTIME_INACTIVE:
                          panic("TNF already inactive");
                          /*NOTREACHED*/
                  }
  
!         } while (atomic_cas_32((uint32_t *)&dtrace_vtime_active,
              state, nstate) != state);
  }
  
  void
  dtrace_vtime_switch(kthread_t *next)