[fix] after phyid addition, the init function should init correct phy.
ethernet: mac stm32fxx7: Fix style and docs

Rushed commits are bad mkay :)
Updated style
[ETH/PHY] Add support for LAN87XX family of PHYs
[ETH/PHY] Add support for STE100 PHY used on some boards from ST
[ETH/PHY] Add support for Micrel KSZ80X1 family of PHYs