MAINTAINERS: CHINESE MAINTAINERS mailing list is subscribers only

Mark it so.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Harry Wei <harryxiyou@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 6892b26..8175ca8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1929,7 +1929,7 @@
 
 CHINESE DOCUMENTATION
 M:	Harry Wei <harryxiyou@gmail.com>
-L:	xiyoulinuxkernelgroup@googlegroups.com
+L:	xiyoulinuxkernelgroup@googlegroups.com (subscribers-only)
 L:	linux-kernel@zh-kernel.org (moderated for non-subscribers)
 S:	Maintained
 F:	Documentation/zh_CN/