Setup_ipeniris.py: port argument is unnecessarily restrictive

[Ahtlon]

The check for only COM ports (line 600) prevents the script from working on linux where the right port is usually /dev/ttyACM0 or similar.

[lorow]

That's a mistake on my part, I was developing that tool on windows for my own testing purposes, it then grew into a proper utility and never got updated to support linux. Since then I've switched to linux myself, proper support should be added soon-ish!