[PATCH] Fix up 'linux-dvb' maintainers entry

We've created a new e-mail address which is currently an open
mailing-list anybody can subscribe to. 

It's currently watched by the main developers.  If spam takes over the
list, we might change it to "moderated" or even route it to one single
person.

MAINTAINERS

@@ -709,7 +709,8 @@ S:	Maintained
 
 DVB SUBSYSTEM AND DRIVERS
 P:	LinuxTV.org Project
-L: 	linux-dvb@linuxtv.org
+M: 	linux-dvb-maintainer@linuxtv.org
+L: 	linux-dvb@linuxtv.org (subscription required)
 W:	http://linuxtv.org/developer/dvb.xml
 S:	Supported