From: James Bottomley <James.Bottomley@SteelEye.com>

The alder has an intel Extended Express System Support Controller which
presents apparently spurious BARs.  When the pci resource code tries to
reassign these BARs, the second IO-APIC gets disabled (with disastrous
consequences).

The first BAR is the actual IO-APIC, the remaining five bars seem to be
spurious resources, so we forcibly insert the first one into the resource
tree and clear all the others.