FreeNAS Code

Backport r217444 and 217875 from FreeBSD -HEAD.

Some old WD SATA disks report supported and enabled device-initiated
interface power management, but return ABORT error on attempt to disable
it. Make CAM SATA probe sequence ignore this error, as it is not fatal.

Ignore also ATA status errors on DMA Auto-Activation enabling request.
Some HP disks reported to return ABORT error there while declaring support
for this feature.