Zybo implementation of PWM HW interfaces is wrong

The HW interfaces describe PWM widths in μs, but current implementation is returning something that is a factor of 10 off of μs.

This odd 10^-8 unit has always existed in quad app, but now we should address it to be sure there isn't any confusion at the hw interface.

Disclaimer: Wrong as in semantically wrong.

assigned to @bbartels

added In Progress label

closed

Discussion for solution is on #9 (closed).

removed In Progress label