Along the pieces that were determined to have security relevance
there are quite a few more fixes / improvements (or so I hope)
which were decided to not become part of the XSA itself.

1: obtain IVHD type to use earlier
2: improve (extended) feature detection
3: check IVMD ranges against host implementation limits
4: respect AtsDisabled device flag
5: pull ATS disabling earlier
6: expose errors and warnings unconditionally

Jan