5045 use atomic_{inc,dec}_* instead of atomic_add_*

*** 394,415 ****
   * If a component has a reference to a kcf_policy_desc_t,
   * it REFHOLD()s. A new policy descriptor which is referenced only
   * by the policy table has a reference count of one.
   */
  #define KCF_POLICY_REFHOLD(desc) {              \
!         atomic_add_32(&(desc)->pd_refcnt, 1);   \
          ASSERT((desc)->pd_refcnt != 0);         \
  }
  
  /*
   * Releases a reference to a policy descriptor. When the last
   * reference is released, the descriptor is freed.
   */
  #define KCF_POLICY_REFRELE(desc) {                              \
          ASSERT((desc)->pd_refcnt != 0);                         \
          membar_exit();                                          \
!         if (atomic_add_32_nv(&(desc)->pd_refcnt, -1) == 0)      \
                  kcf_policy_free_desc(desc);                     \
  }
  
  /*
   * This entry stores the name of a software module and its
--- 394,415 ----
   * If a component has a reference to a kcf_policy_desc_t,
   * it REFHOLD()s. A new policy descriptor which is referenced only
   * by the policy table has a reference count of one.
   */
  #define KCF_POLICY_REFHOLD(desc) {              \
!         atomic_inc_32(&(desc)->pd_refcnt);      \
          ASSERT((desc)->pd_refcnt != 0);         \
  }
  
  /*
   * Releases a reference to a policy descriptor. When the last
   * reference is released, the descriptor is freed.
   */
  #define KCF_POLICY_REFRELE(desc) {                              \
          ASSERT((desc)->pd_refcnt != 0);                         \
          membar_exit();                                          \
!         if (atomic_dec_32_nv(&(desc)->pd_refcnt) == 0)  \
                  kcf_policy_free_desc(desc);                     \
  }
  
  /*
   * This entry stores the name of a software module and its