of: return NUMA_NO_NODE from fallback of_node_to_nid()

[ Upstream commit c8fff7bc5bba6bd59cad40441c189c4efe7190f6 ]

Node 0 might be offline as well as any other numa node,
in this case kernel cannot handle memory allocation and crashes.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 0c3f061c ("of: implement of_node_to_nid as a weak function")
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>