added location constraint for ac701 PCIe BRAMs
added location constraint for ac701 PCIe BRAMs

Change-Id: I9225a4e382d4fbb5dd4784f70d80394465a86dcd

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