Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"

Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"

Revert 2ef5c38fb0eb ("PCI: Add helpers to manage pci_dev->irq and
pci_dev->irq_managed").

This is part of reverting 2ea2e868c3ea ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 2ea2e868c3ea ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>