[ewg] IB/ipoib: Fix neigh destructor oops for kernels older than 2.6.21

[Eli Cohen]

On Mon, 2008-05-19 at 10:01 +0300, Or Gerlitz wrote:

> I see that you have merged the patch, so sorry, but I am not going to 
> look on it. Have someone else reviewed it before the merge?
Unfortunately not. But I did not want to leave this problem pending
anymore since I want to get some mileage on it. Still, if we have a
better solution it would be easy to adopt since this patch is
independent of all others.