XXXX pass in cpu_pause_func via pause_cpus

*** 408,418 ****
   * prom functions are callable while the cpus are paused.
   */
  void
  promsafe_pause_cpus(void)
  {
!         pause_cpus(NULL);
  
          /* If some other cpu is entering or is in the prom, spin */
          while (prom_cpu || mutex_owner(&prom_mutex)) {
  
                  start_cpus();
--- 408,418 ----
   * prom functions are callable while the cpus are paused.
   */
  void
  promsafe_pause_cpus(void)
  {
!         pause_cpus(NULL, NULL);
  
          /* If some other cpu is entering or is in the prom, spin */
          while (prom_cpu || mutex_owner(&prom_mutex)) {
  
                  start_cpus();
*** 421,431 ****
                  /* Wait for other cpu to exit prom */
                  while (prom_cpu)
                          cv_wait(&prom_cv, &prom_mutex);
  
                  mutex_exit(&prom_mutex);
!                 pause_cpus(NULL);
          }
  
          /* At this point all cpus are paused and none are in the prom */
  }
  
--- 421,431 ----
                  /* Wait for other cpu to exit prom */
                  while (prom_cpu)
                          cv_wait(&prom_cv, &prom_mutex);
  
                  mutex_exit(&prom_mutex);
!                 pause_cpus(NULL, NULL);
          }
  
          /* At this point all cpus are paused and none are in the prom */
  }