This updates the RFNoC image cores to separate the two DRAM banks on
X4xx by splitting them into "dram0" and "dram1". Previously, both DRAM
banks shared the same DRAM port, named "dram", which created some
confusion.
The Replay block has also been duplicated in the bitstreams that use
both banks, so we now have one Replay block per bank.
Original-commit: b5cfab8922e5b3f4ff13a8a64e8b0319876f13db