* elf/dl-lookup.c (PROTECTED): Remove defines.
(add_dependency): Mark it with internal_function.
(_dl_do_lookup, _dl_do_lookup_versioned): New functions.
(_dl_lookup_symbol, _dl_lookup_symbol_skip,
_dl_lookup_versioned_symbol, _dl_lookup_versioned_symbol_skip): Use
it if we don't want do_lookup* inlined.