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

*** 357,373 ****
          else                                                    \
                  rval = 1;                                       \
  }
  
  #define SF_SCD_INCR_REF(scdp) {                                         \
!         atomic_add_32((volatile uint32_t *)&(scdp)->scd_refcnt, 1);     \
  }
  
  #define SF_SCD_DECR_REF(srdp, scdp) {                           \
          sf_region_map_t _scd_rmap = (scdp)->scd_region_map;     \
!         if (!atomic_add_32_nv(                                  \
!             (volatile uint32_t *)&(scdp)->scd_refcnt, -1)) {    \
                  sfmmu_destroy_scd((srdp), (scdp), &_scd_rmap);  \
          }                                                       \
  }
  
  /*
--- 357,372 ----
          else                                                    \
                  rval = 1;                                       \
  }
  
  #define SF_SCD_INCR_REF(scdp) {                                         \
!         atomic_inc_32((volatile uint32_t *)&(scdp)->scd_refcnt);        \
  }
  
  #define SF_SCD_DECR_REF(srdp, scdp) {                           \
          sf_region_map_t _scd_rmap = (scdp)->scd_region_map;     \
!         if (!atomic_dec_32_nv((volatile uint32_t *)&(scdp)->scd_refcnt)) {\
                  sfmmu_destroy_scd((srdp), (scdp), &_scd_rmap);  \
          }                                                       \
  }
  
  /*