Update to a hopefully more future proof FSF address

See also 70539e1850ddd3a7ee6f9a8db7bd8e81b85225a4,
8167ee883931cb20c6264fc19d040ce2dc6ceaaa,
530e7615ce3c01882e582c84dc6304ab98a3d5c5 and
fad6cb1a565bb73f83fc0e2654489457b489e436.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/ia64-dis.c b/ia64-dis.c
index a025178..da73a98 100644
--- a/ia64-dis.c
+++ b/ia64-dis.c
@@ -990,9 +990,8 @@
    the GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this file; see the file COPYING.  If not, write to the
-   Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with this file; see the file COPYING.  If not, see
+   <http://www.gnu.org/licenses/>. */
 
 /* The primary opcode table is made up of the following: */
 struct ia64_main_table
@@ -9906,9 +9905,8 @@
    the GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this file; see the file COPYING.  If not, write to the
-   Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with this file; see the file COPYING.  If not, see
+   <http://www.gnu.org/licenses/>. */
 
 static const struct ia64_templ_desc ia64_templ_desc[16] =
   {