Nano-edge placement feature for eFlexPWM module based on KV4x

[#1]

The DOC introduces the nano-edge placement  feature for KV4x family, it gives the application for the nano-edge placement feature, in other words, it's target is to increase the PWM signal resolution. It gives the example code and PWM waveform for the nano-edge placement feature.

[merigotbertrand]

Thank you for this very helpfull document.

I Operate it as I was beginning the flexpwm module of kinetis KV46F256

Regards

bertrand