v2:
- Tag collection.
- Patch 2 discussion on appropriate license concluded that this should
have originally only been accepted on GPL-v2 and later. However, I've
left it as GPL-v2-only as that is what was used for other CXL files and
for the license to be usefully relaxed we need to do them all - which
is a job for another day.
- Added SPDX
- Added similar header to cxl_type3_stubs.c
Misc set of trivial fixes. No conflicts with other sets outstanding
so can go with main CXL patches or perhaps via the trivial tree.