USB4 host reset (& writing to router config space)

[obiwac_gmail.com]

Summary

Get host interface version (either 1.0 or 2.0) and reset accordingly.

This required support for writing to router config space.

Test Plan

Tested on AMD Pink Sardine controller (1022:1668/9), which is host interface version 1.0. It would be nice to try this out on version 2.0, but unfortunately I don't have the hardware to do this as it is fairly new.

This does require the D49451 patch to work on Pink Sardine.