add win7 pcie quirk

add win7 pcie quirk

Win7 is very picky about pcie assignments and fails with
'error 12' the way we add hospci devices.

To combat that, we simply give the hostpci device a normal port
instead.

Start with address 0x10, so that we have space before those devices,
and between them and the ones configured in pve-q35.cfg should we
need it in the future.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>