5042 stop using deprecated atomic functions

*** 21,32 ****
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/types.h>
  #include <sys/systm.h>
  #include <sys/archsystm.h>
  #include <sys/machsystm.h>
  #include <sys/t_lock.h>
--- 21,30 ----
*** 159,169 ****
                  va = ppmap_vaddrs[nset];
                  if (va != NULL) {
  #ifdef PPDEBUG
                          align_hits++;
  #endif /* PPDEBUG */
!                         if (casptr(&ppmap_vaddrs[nset], va, NULL) == va) {
                                  hat_memload(kas.a_hat, va, pp,
                                      vprot | HAT_NOSYNC,
                                      HAT_LOAD_LOCK);
                                  return (va);
                          }
--- 157,168 ----
                  va = ppmap_vaddrs[nset];
                  if (va != NULL) {
  #ifdef PPDEBUG
                          align_hits++;
  #endif /* PPDEBUG */
!                         if (atomic_cas_ptr(&ppmap_vaddrs[nset], va, NULL) ==
!                             va) {
                                  hat_memload(kas.a_hat, va, pp,
                                      vprot | HAT_NOSYNC,
                                      HAT_LOAD_LOCK);
                                  return (va);
                          }