5042 stop using deprecated atomic functions

@@ -162,15 +162,15 @@
         if (enabled) {
                 ASSERT(sysent[sysnum].sy_callc == dtrace_systrace_syscall);
                 return (0);
         }
 
-        (void) casptr(&sysent[sysnum].sy_callc,
+        (void) atomic_cas_ptr(&sysent[sysnum].sy_callc,
             (void *)systrace_sysent[sysnum].stsy_underlying,
             (void *)dtrace_systrace_syscall);
 #ifdef _SYSCALL32_IMPL
-        (void) casptr(&sysent32[sysnum].sy_callc,
+        (void) atomic_cas_ptr(&sysent32[sysnum].sy_callc,
             (void *)systrace_sysent32[sysnum].stsy_underlying,
             (void *)dtrace_systrace_syscall32);
 #endif
         return (0);
 }

@@ -182,16 +182,16 @@
         int sysnum = SYSTRACE_SYSNUM((uintptr_t)parg);
         int disable = (systrace_sysent[sysnum].stsy_entry == DTRACE_IDNONE ||
             systrace_sysent[sysnum].stsy_return == DTRACE_IDNONE);
 
         if (disable) {
-                (void) casptr(&sysent[sysnum].sy_callc,
+                (void) atomic_cas_ptr(&sysent[sysnum].sy_callc,
                     (void *)dtrace_systrace_syscall,
                     (void *)systrace_sysent[sysnum].stsy_underlying);
 
 #ifdef _SYSCALL32_IMPL
-                (void) casptr(&sysent32[sysnum].sy_callc,
+                (void) atomic_cas_ptr(&sysent32[sysnum].sy_callc,
                     (void *)dtrace_systrace_syscall32,
                     (void *)systrace_sysent32[sysnum].stsy_underlying);
 #endif
         }