Hi,
Can you post the full boot log ?
looking back at that bug, I think it couldn't find the SD device either due to not waiting long enough or a kernel change.
I don't have easy access to an APU thats not in use. you should see the SD device and controller during boot
umass0: <Generic Flash Card ReaderWriter, class 0/0, rev 2.01/1.00, addr 2> on usbus6
da0: <Multiple Card Reader 1.00> Removable Direct Access SCSI-4 device