fixes missing namespaces

src/sysc/sc_core_adapter.h

@@ -88,7 +88,7 @@ public:
                 if (sizeof(reg_t) != 4) return iss::Err;
                 val = static_cast<reg_t>(time_val >> 32);
             }
-            return ret?Ok:Err;
+            return ret?iss::Ok:iss::Err;
 #else
         if((addr==iss::arch::time || addr==iss::arch::timeh)){
             uint64_t time_val = owner->mtime_i.read();
@@ -141,7 +141,7 @@ public:
 
 private:
     sysc::tgfs::core_complex *const owner;
-    sc_event wfi_evt;
+    sc_core::sc_event wfi_evt;
 };