LCU link module (high speed downlink) for XC1000 FPGA part

This is just a recompilation of the original source code for the MR2 release.
Therefore there will no connections to the RX and TX ports and respective LEDs that have been added to the PCB since then.

This is thus a replica of the current release version of the 7125 High speed downlink Link Module Firmware.  Note that this means the revision register is the same as the original release (3220). Since the FPGA will not configure with the wrong size for the part if BITE revision is seen it will be the right part.

There were no substansial release notes for original.
