kho_retrieve_subtree
int kho_retrieve_subtree(const char *name, phys_addr_t *phys);
EXPORT_SYMBOL_GPL(kho_retrieve_subtree);
err = kho_retrieve_subtree(LUO_FDT_KHO_ENTRY_NAME, &fdt_phys);
err = kho_retrieve_subtree(KHO_TEST_FDT, &fdt_phys);
err = kho_retrieve_subtree(MEMBLOCK_KHO_FDT, &fdt_phys);