other targets build fix

Author: Jatin Bhateja

src/hotspot/share/opto/chaitin.cpp

@@ -1650,7 +1650,7 @@ uint PhaseChaitin::Select( ) {
       }
     };
 
-    if (UseAPX) {
+    if (X86_ONLY(UseAPX) NOT_X86(false)) {
       Node* def = lrg->_def;
       if (def->is_Mach()) {
         MachNode* mdef = def->as_Mach();