add a buffer to try to meet timing on vc707
add a buffer to try to meet timing on vc707

Change-Id: I29d4d68a0e1ad69c37f9f4c4b431124dd5d418a8

hanw/connectal,cambridgehackers/connectal,chenm001/connectal,chenm001/connectal,cambridgehackers/connectal,csail-csg/connectal,8l/connectal,chenm001/connectal,hanw/connectal,csail-csg/connectal,csail-csg/connectal,8l/connectal,hanw/connectal,hanw/connectal,csail-csg/connectal,hanw/connectal,8l/connectal,csail-csg/connectal,8l/connectal,8l/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal