MAINTAINERS: update ivtv mailing lists as subscriber-only

Mark these as subscriber-only mailing lists.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Walls <awalls@md.metrocast.net>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -2723,7 +2723,7 @@ F:	drivers/net/wireless/cw1200/
 
 CX18 VIDEO4LINUX DRIVER
 M:	Andy Walls <awalls@md.metrocast.net>
-L:	ivtv-devel@ivtvdriver.org (moderated for non-subscribers)
+L:	ivtv-devel@ivtvdriver.org (subscribers-only)
 L:	linux-media@vger.kernel.org
 T:	git git://linuxtv.org/media_tree.git
 W:	http://linuxtv.org
@@ -5209,7 +5209,7 @@ F:	drivers/media/tuners/it913x*
 
 IVTV VIDEO4LINUX DRIVER
 M:	Andy Walls <awalls@md.metrocast.net>
-L:	ivtv-devel@ivtvdriver.org (moderated for non-subscribers)
+L:	ivtv-devel@ivtvdriver.org (subscribers-only)
 L:	linux-media@vger.kernel.org
 T:	git git://linuxtv.org/media_tree.git
 W:	http://www.ivtvdriver.org