prom_finddevice
phandle prom_finddevice(char *name);
phandle prom_finddevice(const char *name);
phandle chosen = prom_finddevice("/chosen");
phandle ssnode = prom_finddevice("/ssp-serial");
phandle node = prom_finddevice("/memory");
node = prom_finddevice("/virtual-memory");
prom_chosen_node = prom_finddevice(prom_chosen_path);
node = prom_finddevice("/openprom");
node = prom_finddevice(prom_chosen_path);
node = prom_finddevice("/chosen");
EXPORT_SYMBOL(prom_finddevice);
EXPORT_SYMBOL(prom_finddevice);