libfdt: Increase namespace-pollution paranoia

[Jon Loeliger]

> 
> > On a slightly unrelated note, are you planning to sync the in-kernel
> > dtc/libfdt version with the upstream version anytime soon?
> 
> I know jon put an -rc, not sure if he plans to pick up the slew of  
> patches for the next -rc or the next release, but it would be good to  
> resync the in-kernel version for 2.6.27.
> 
> - k

My (DTC) plan is to apply the single patch with some
include file fixes, and release that.

I'll line the slew of patches up for the following release.

jdl