PIIX support to release its mapping on the edge/level control registers.
Now that these are guaranteed to be unmapped, capture and restore the
registers in piixpcib(4)'s powerhook. The same will need to be done on a
per-chipset basis.
Concerns were raised about calling pci_intr_fixup on resume WRT hotplug
devices, so this has been removed.
Ok cube@.
(ICH2 and later), which fixes PR/23700.
The changes are from Hiroyuki Bessho and Masanori Kanaoka in PR/23700
with a little modification of interrupt router lookup from mine.
