[TF-M] Proposal for coding standard update: Increase chars per line 80-> 128.

Hi,

TF-M coding standardhttps://tf-m-user-guide.trustedfirmware.org/contributing/coding_guide.html mandates up to 80 characters per line. This looks a bit too restrictive nowadays with no punch cards or text terminals. I propose to increase this limit to 120 or 140 characters. Personally like 128.

Are there any thoughts or objections against it?

Thanks, Anton