uclibc-ng: enable NPTL for m68k/microblaze
With 1.0.28 NPTL support for m68k was added.
Microblaze is already supported for a while, enable it now to
benefit from it.
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>