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

*** 718,735 ****
  
                          ipl_pad_to_bit_31 : 31;
  } ipsec_latch_t;
  
  #define IPLATCH_REFHOLD(ipl) { \
!         atomic_add_32(&(ipl)->ipl_refcnt, 1);           \
          ASSERT((ipl)->ipl_refcnt != 0);                 \
  }
  
  #define IPLATCH_REFRELE(ipl) {                          \
          ASSERT((ipl)->ipl_refcnt != 0);                         \
          membar_exit();                                          \
!         if (atomic_add_32_nv(&(ipl)->ipl_refcnt, -1) == 0)      \
                  iplatch_free(ipl);                              \
  }
  
  /*
   * peer identity structure.
--- 718,735 ----
  
                          ipl_pad_to_bit_31 : 31;
  } ipsec_latch_t;
  
  #define IPLATCH_REFHOLD(ipl) { \
!         atomic_inc_32(&(ipl)->ipl_refcnt);              \
          ASSERT((ipl)->ipl_refcnt != 0);                 \
  }
  
  #define IPLATCH_REFRELE(ipl) {                          \
          ASSERT((ipl)->ipl_refcnt != 0);                         \
          membar_exit();                                          \
!         if (atomic_dec_32_nv(&(ipl)->ipl_refcnt) == 0)  \
                  iplatch_free(ipl);                              \
  }
  
  /*
   * peer identity structure.