V4L/DVB: cx18, cx23885, v4l2 doc, MAINTAINERS: Update Andy Walls' email address

A trivial change to update my email address from my dead awalls@radix.net
address to my current awalls@md.metrocast.net address.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/cx18/cx18-scb.h b/drivers/media/video/cx18/cx18-scb.h
index 368f23d..0887765 100644
--- a/drivers/media/video/cx18/cx18-scb.h
+++ b/drivers/media/video/cx18/cx18-scb.h
@@ -2,7 +2,7 @@
  *  cx18 System Control Block initialization
  *
  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
- *  Copyright (C) 2008  Andy Walls <awalls@radix.net>
+ *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by