fdt_get_property
prop = fdt_get_property(initial_boot_params, off,
phy_prop = fdt_get_property(initial_boot_params, eth, "phy-handle", NULL);
prop = fdt_get_property(fdt, cpus_subnode_offset, "device_type", NULL);
const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
fdt_get_property(fdt, nodeoffset, name, lenp);