Merge branch 'neigh'

Jiri Pirko says:

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neigh: respect default parms values

This is a long standing regression. But since the patchset is bigger and
the regression happened in 2007, I'm proposing this to net-next instead.

Basically the problem is that if user wants to use /etc/sysctl.conf to specify
default values of neigh related params, he is not able to do that.

The reason is that the default values are copied to dev instance right after
netdev is registered. And that is way to early. The original behaviour
for ipv4 was that this happened after first address was assigned to device.
For ipv6 this was apparently from the very beginning.

So this patchset basically reverts the behaviour back to what it was in 2007 for
ipv4 and changes the behaviour for ipv6 so they are both the same.
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Signed-off-by: David S. Miller <davem@davemloft.net>