[PATCH 5/7] CXL: Disable AFU debug flag

[Ian Munsie]

This one would be nice to go to stable, but I'm not sure it really meets
the rules. It could be a problem for userspace error paths checking the
result of MMIO reads, but only if the AFU has actually been unexpectedly
disabled somehow yet the PSL is still responding...

I don't think this is a high priority to go to stable unless it starts
causing problems for someone.

Cheers,
-Ian