ARM: sunxi: dt: Remove the FSF address

The FSF address triggers a warning on checkpatch, saying that the FSF
license is already present in the Linux source code, and that it has
already changed in the past.

Remove it from our DT, as suggested.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun7i-a20-orangepi.dts

@@ -18,11 +18,6 @@
  *     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 file; if not, write to the Free
- *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- *     MA 02110-1301 USA
- *
  * Or, alternatively,
  *
  *  b) Permission is hereby granted, free of charge, to any person