[Backport] 2 terminal smd chip: Pad equations where outdated
- New industry standards have updated not only the fillet sizes but also the way how tolerances are respected.
- For devices that directly give the lead to lead spacing no complicated calculations are necessary. (was wrong previously)
This is the sister PR for https://github.com/KiCad/kicad-footprints/pull/689 handling the backport branch