powerpc/mm/numa: Fix break placement

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81631


Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>