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

@@ -180,11 +180,11 @@
 };
 
 kstat_named_t *rdmarsstat_ptr = (kstat_named_t *)&rdmarsstat;
 uint_t rdmarsstat_ndata = sizeof (rdmarsstat) / sizeof (kstat_named_t);
 
-#define RSSTAT_INCR(x)  atomic_add_64(&rdmarsstat.x.value.ui64, 1)
+#define RSSTAT_INCR(x)  atomic_inc_64(&rdmarsstat.x.value.ui64)
 /*
  * Create a transport record.
  * The transport record, output buffer, and private data structure
  * are allocated.  The output buffer is serialized into using xdrmem.
  * There is one transport record per user process which implements a