PCI: Add restore_dev_resource()

Resource fitting needs to restore the saved dev resources in a few places.
Add a restore_dev_resource() helper for that.

Link: https://lore.kernel.org/r/20241216175632.4175-19-ilpo.jarvinen@linux.intel.com


Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Xiaochun Lee <lixc17@lenovo.com>