Add CXL trace collection
Add CXL trace collection

Dumping is done after an error is detected. That hopefully avoids messing
up the timing too much.

tblume/genwqe-user,ibm-genwqe/genwqe-user,ibm-genwqe/genwqe-user,ferseiti/genwqe-user,tblume/genwqe-user,ferseiti/genwqe-user,ibm-genwqe/genwqe-user