[PATCH] PCI: Revert "Implement pcibios_alloc_irq() and pcibios_free_irq()"

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We have two reports of drivers broken in v4.3 by Jiang's change,
991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and
pcibios_free_irq()").

It would be best to fix the problem instead of reverting 991de2e59090, but
I don't have time to do that myself, and we haven't heard from Jiang, so
the only choice I have is to revert the commit.

Note that reverting will likely break IOAPIC hotplug.

I haven't put my signed-off on it yet because it didn't revert cleanly, and
I'm not sure that I did it correctly.

Олег and Sunjin, can you please test this and see whether it fixes your
drivers?  This patch is based on v4.5-rc1.

---

Bjorn Helgaas (1):
      Revert 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")


 arch/x86/include/asm/pci_x86.h |    2 ++
 arch/x86/pci/common.c          |   27 +++++++++++----------------
 arch/x86/pci/intel_mid_pci.c   |    7 ++-----
 arch/x86/pci/irq.c             |   15 ++++++++++++++-
 drivers/acpi/pci_irq.c         |    8 ++++++++
 5 files changed, 37 insertions(+), 22 deletions(-)
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