MAINTAINERS: add second list for IRDA

The irda-users-list is currently almost dead and subscribers-only. Adding
netdev increases the audience which might help to not overlook a bugreport
again.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

MAINTAINERS

@@ -3417,6 +3417,7 @@ F:	net/ipx/
 IRDA SUBSYSTEM
 M:	Samuel Ortiz <samuel@sortiz.org>
 L:	irda-users@lists.sourceforge.net (subscribers-only)
+L:	netdev@vger.kernel.org
 W:	http://irda.sourceforge.net/
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sameo/irda-2.6.git