fix portalDCacheFlush compile errors on x86
fix portalDCacheFlush compile errors on x86

cambridgehackers/connectal,cambridgehackers/connectal,hanw/connectal,cambridgehackers/connectal,hanw/connectal,chenm001/connectal,chenm001/connectal,csail-csg/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal,hanw/connectal,csail-csg/connectal,csail-csg/connectal,cambridgehackers/connectal,hanw/connectal,hanw/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal