copy_property
ret = copy_property(fdt, pci_offset, dn, "ibm,dma-window");
ret = copy_property(fdt, pci_offset, dn, dmapropname);
copy_property(np, win_name, "ibm,dma-window-saved");
copy_property(pdn, "ibm,dma-window", "ibm,dma-window-saved");
copy_property(pdn, "ibm,dma-window-saved", "ibm,dma-window");