MAINTAINERS: rt2x00 list is moderated

Cc: users@rt2x00.serialmonkey.com
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

MAINTAINERS

@@ -4280,7 +4280,7 @@ F:	drivers/video/aty/aty128fb.c
 RALINK RT2X00 WIRELESS LAN DRIVER
 P:	rt2x00 project
 L:	linux-wireless@vger.kernel.org
-L:	users@rt2x00.serialmonkey.com
+L:	users@rt2x00.serialmonkey.com (moderated for non-subscribers)
 W:	http://rt2x00.serialmonkey.com/
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ivd/rt2x00.git