hwmon: (tmp421) Drop FSF mailing address

The FSF mailing address can and will change over time,
so drop it.

Signed-off-by: Guenter Roeck <[e-mail]>
Reviewed-by: Jean Delvare <[e-mail]>

drivers/hwmon/tmp421.c

···
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*