[patch] ioapic-2.4.5-A1

[Ingo Molnar]

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the attached ioapic-2.4.5-A1 patch includes a number of important IO-APIC
related fixes (against 2.4.5-ac3):

 - correctly handle bridged devices that are not listed in the mptable
   directly. This fixes eg. dual-port eepro100 devices on Compaq boxes
   with such PCI layout:

    -+-[0d]---0b.0
     +-[05]-+-02.0
     |      \-0b.0
     \-[00]-+-02.0
            +-03.0-[01]--+-04.0    <=== eth0
            |            \-05.0    <=== eth1
            +-0b.0
            +-0c.0
            +-0d.0
            +-0e.0
            +-0f.0
            +-14.0
            +-14.1
            +-19.0
            +-1a.0
            \-1b.0

   without the patch the eepro100 devices get misdetected as XT-PIC IRQs
   and their interrupts are stuck.

 - the srcbus entry in the mptable does not have to be translated into
   a PCI-bus value.

 - add more APIC versions to the whitelist

 - initialize mp_bus_id_to_pci_bus[] correctly, so that we can detect
   nonlisted/bridged PCI busses more accurately.

the patch should only affect systems that were not working properly
before, but it might break broken-mptable systems - we'll see.

	Ingo

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