6-STABLE/amd64 recent kernel can't see any ata disks

[James Seward]

With apologies for the delay (due to external influences and problems
like finding my serial cable), here is the output of boot -v on a
newer kernel (compiled Monday morning from a cvsup on Sunday if memory
serves).

http://sakaki.jamesoff.net/~james/dmesg-broken.txt

If anyone has any suggestions of things to try or to check I'd be most
grateful; should I just go ahead and file a PR for this?

Thanks,
James