The todo list associate with xdma

[IveanEx]

This is the tasks list still need to be done after merging PR#199:

• Move reader & writer inside xdma as common cells for snax, and reused by streamer. @xiaoling-yi
• Merge hw/chisel_acc into one sub-directory of hw/chisel. @xiaoling-yi @rgantonio
• Move xdma inside snitch_cluster.sv, and add AXI interface. @Konste11ation @IveanEx, and our new master's thesis student @HapoPatrick
• Automatic generation of snax-xdma-csr-addr.h PR#201
• Rewrite gen_chisel_file to do the automatic param passing @rgantonio @IveanEx
• Move csr_write_soft_switch to common library PR#202
• We need to add another list of cleaning up with other things too! Especially the software make files.

[rgantonio]

We need to add another list of cleaning up with other things too! Especially the software make files.