RELENG_5: ata interrupt problems

[Brian Buchanan]

> Anyhow I committed a fix for the fake slave problem, now we still have
> those "taskqueue stalled" complaints that I'm still scratching my head
> about and that backstepping ATA doesn't solve...

1.33 of ata-queue.c fixes the problem for me at boot, but I still have the
"taskqueue stalled" problem after resuming from suspend, as expected.  Let
me know if there's anything I can do to help track that down.

Thanks,

Brian