net/6lowpan: Remove FSF address from GPL statement.

This might change and we already deliver a copy of the license with
the kernel. This was already removed form the ieee802154 code but
missed here.

Signed-off-by: Stefan Schmidt <s.schmidt@samsung.com>
Acked-by: Alexander Aring <alex.aring@gmail.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/6lowpan/iphc.c

@@ -15,9 +15,6 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 /* Jon's code is based on 6lowpan implementation for Contiki which is: