From: Bjorn Helgaas <bjorn.helgaas@hp.com>

Now that PCI interrupts are routed in pci_enable_device(), remove the
unconditional routing previously done in pci_acpi_init().

This has the potential to break drivers that don't use pci_enable_device()
correctly, so I also added a "pci=routeirq" kernel option that restores the
previous behavior.  I intend to remove that option, along with all the code
below, in a month or so.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>