remove some warnings from ZynqTop builds
remove some warnings from ZynqTop builds

chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal,cambridgehackers/connectal,chenm001/connectal,chenm001/connectal