dtc: Remove redundant copy of the GPL

[Jon Loeliger]

So, like, the other day David Gibson mumbled:
> The dtc tree currently includes two copies of the GPL - one which was
> there originally, and one imported from the libfdt tree.  This patch
> gets rid of the extra copy in the libfdt tree.
> 
> In addition it renames the file containing the remaining copy from
> COPYING to GPL.  Since libfdt is dual-licensed, this seems clearer.
> 
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

Applied.

Thanks,
jdl


PS -- Now stop that.  I have to pack for OLS still. :-)

jdl