[coreboot] GPL license headers

[Patrick Georgi]

Hi all,

we recently removed the FSF addresses from license headers in our
files to avoid the maintenance of updating them every time the FSF
decides to move their office.

Now we also added checkpatch.pl that comes from Linux to automatically
ensure some consistency across the tree, and it looks for removal of
the entire paragraph.
Now, that may just make sense and I'm willing to update the scripts to
do that and update the tree.

The paragraph in question is:
----
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc.
----

Since the GPL is fairly well-known (incl where to find it), and our
tree already contains the license in the toplevel directory, that
paragraph shouldn't be necessary.


Opinions?
Patrick
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