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

@@ -232,30 +232,30 @@
         kcondvar_t      lg_port_cv;
         int             lg_port_ref;
 } aggr_grp_t;
 
 #define AGGR_GRP_REFHOLD(grp) {                 \
-        atomic_add_32(&(grp)->lg_refs, 1);      \
+        atomic_inc_32(&(grp)->lg_refs); \
         ASSERT((grp)->lg_refs != 0);            \
 }
 
 #define AGGR_GRP_REFRELE(grp) {                                 \
         ASSERT((grp)->lg_refs != 0);                            \
         membar_exit();                                          \
-        if (atomic_add_32_nv(&(grp)->lg_refs, -1) == 0)         \
+        if (atomic_dec_32_nv(&(grp)->lg_refs) == 0)             \
                 aggr_grp_free(grp);                             \
 }
 
 #define AGGR_PORT_REFHOLD(port) {               \
-        atomic_add_32(&(port)->lp_refs, 1);     \
+        atomic_inc_32(&(port)->lp_refs);        \
         ASSERT((port)->lp_refs != 0);           \
 }
 
 #define AGGR_PORT_REFRELE(port) {                               \
         ASSERT((port)->lp_refs != 0);                           \
         membar_exit();                                          \
-        if (atomic_add_32_nv(&(port)->lp_refs, -1) == 0)        \
+        if (atomic_dec_32_nv(&(port)->lp_refs) == 0)    \
                 aggr_port_free(port);                           \
 }
 
 extern dev_info_t *aggr_dip;
 extern int aggr_ioc_init(void);