PCI, x86, ACPI: get ioapic address from acpi device

Some ioapic controllers do not show up on pci config space,
or pci device is there but no bar is used and is set by firmware in
other non standard registers.

We can get ioapic address from ACPI0009's _CRS.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>

1 file changed