MDIO analyzer currently requires the data channel to return to high in between frames, when the specification does not require it

[Marcus10110]

The analyzer starts processing every frame with these two calls:

AdvanceToHighMDIO();
AdvanceToStartFrame();

which essentially advance the data until a transition on the data channel is found from high to low.

However, if an existing frame finishes and leaves the data channel low, the specification does not require the data line to return high before the start bits of the next frame.

This document seems to have a pretty good description of the operation:
https://www.st.com/content/ccc/resource/training/technical/product_training/group0/38/cc/5f/43/91/41/40/d1/STM32F7_Peripheral_MDIOS/files/STM32F7_Peripheral_MDIOS.pdf/_jcr_content/translations/en.STM32F7_Peripheral_MDIOS.pdf