Considering changing repo structure

[aolofsson]

Proposal from @azaidy

1. Change most of umi -->sumi
2. Keep lumi intact
3. Create a common utils dir?

[zephray]

Sounds good to me most of the umi named modules only applies to sumi. Is this change a folder name change only or it involves changing module names as well?

[aolofsson]

Let's agree that in the verilog/chip world, the "umi" prefix stands for "sumi". The S is redundant in this context.

@zephray @azaidy

[azaidy]

So we dont change the repo structure then?

[aolofsson]

Done in #151