Suggestion: Rename SystemVerilog files

[Fighter19]

There are a few files using SystemVerilog, but are simply named ".v" I think it's best to rename them to ".sv", like the rest of the files.

I currently stumbled across these files, but there might be more: drive.v lc8951.v neo_cmc.v hps_io.v

[Toryalai1]

Maybe it is intentional?

[sorgelig]

It's already not applicable to current sources