Extensions to OpenPiton

OpenPiton is an open-source scalable framework for supporting different cores interconnected through a NoC. It integrates the OpenPiton design in new FPGA HW platfrom: Alveo U280. The addition will help other designers to use OpenPiton in a different HW platforms further than the ones provided by the OpenPiton Framework by default. More specifically, adding support for the Xilinx Alveo U280, and U55C.