Call for testers: Apple ATA DMA

[Peter Grehan]

Hi Nathan,

> http://people.freebsd.org/~nwhitehorn/apple-ata-dma.patch

  Boots fine and at least GEOM-probes at UDMA66 in the ata-4 iMac. Just 
need to wipe out the lock-order reversals and do some more testing. So, 
good progress :)

later,

Peter.