alpha: Fix nautilus PCI setup

alpha: Fix nautilus PCI setup

Example (hopefully reasonable) of the new "size_windows" flag usage.

Fixes accidental breakage caused by f75b99d5a77d ("PCI: Enforce bus address
limits in resource allocation").

Fixes: f75b99d5a77d ("PCI: Enforce bus address limits in resource allocation")
Link: https://lore.kernel.org/r/20200318005029.GA8326@mail.rc.ru
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>