dtc: Remove redundant copy of the GPL

[Josh Boyer]

On Tue, Jun 26, 2007 at 11:44:49AM +1000, David Gibson wrote:
> 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.

You might want to remove the mysterious reference to the LGPL in the
EXTRA_DIST variable in the Makefile while you're at it.

josh