Issues addressed:
1. FatBank ack to downstream coalescer with the correct size on ChannelD
2. FatBank ack to downstream coalescer immediately after W Req
3. FatBank generates unique ID for W Req to L2
4. Allows coalescer to config max Coal to L1 ReadSize at compile time
Ungoing issues:
1. Magic Number
2. Verification
3. Multi-Bank Integration