Feedback on Marvell 6176 DSA switch device tree and driver module code

[Sriram Chadalavada]

Here's a detailed overview of what I have been grappling with:

https://stackoverflow.com/questions/62311589/feedback-on-marvell-6176-dsa-switch-device-tree-and-driver-module-code

I also tried a version of the device tree where the mdio device is in 
the dts file without being a subnode of the pci node. With that, the 
kernel doesn't crash but igb based eth0 and ports on the 6176 switch are 
NOT enumerated.

Thanks,

Sriram