get_node_by_path
chosen = get_node_by_path(dt, "/chosen");
(!prop->val.val || !get_node_by_path(dti->dt, prop->val.val))) {
struct node *get_node_by_path(struct node *tree, const char *path);
labeled_node = get_node_by_path(dti->dt, p->val.val);
n = get_node_by_path(dti->dt, fv);
return get_node_by_path(child, p+1);
target = get_node_by_path(target, path);
cpus = get_node_by_path(tree, "/cpus");