ahc doesn't attach in Tyan S2882

[Poul-Henning Kamp]

ahc0: <Adaptec 19160B Ultra160 SCSI adapter> mem 0x80004010-0x8000401f irq 21 at
 device 3.0 on pci1
ahc0: Defaulting to MEMIO on
pci1: child ahc0 requested type 3 for rid 0x14, but the BAR says it is an ioport
pcib3: ahc0 requested I/O range 0x8000-0x8fff: in range
ahc0: Lazy allocation of 0x4 bytes rid 0x10 type 4 at 0x8000
ahc0: PCI Device 1:3:0 failed I/O mapped test.
ahc0: can't allocate register resources

ahc0 at pci1:3:0:  class=0x010000 card=0x62a19005 chip=0x00819005 rev=0x02 hdr=0x00
    vendor   = 'Adaptec Inc'
    device   = '19160 AIC-7892B Ultra160 SCSI Adapter'
    class    = mass storage
    subclass = SCSI


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