MAINTAINERS: add b43 mailing list

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 442d2a7..6e68daa1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1411,6 +1411,7 @@
 B43 WIRELESS DRIVER
 M:	Stefano Brivio <stefano.brivio@polimi.it>
 L:	linux-wireless@vger.kernel.org
+L:	b43-dev@lists.infradead.org (moderated for non-subscribers)
 W:	http://linuxwireless.org/en/users/Drivers/b43
 S:	Maintained
 F:	drivers/net/wireless/b43/