Fix Xeon cpu names not being displayed properly

[imwints]

Closes: #664

I'm not sure if we should keep the 'Xeon' label in front of the name.

I kept the rest of the code in tact and if parsing fails, it falls back to the old mechanism. I hope this doesn't break any existing cpu names.

However it might be easier to just drop lots of symbols like "Intel(R)" and "@ GHz" and keep the remaining ones.