Staging: iio: Add mailing list to the TODO file.

As suggested by Charles Clement

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/TODO b/drivers/staging/iio/TODO
index 15da0c2..898cba1 100644
--- a/drivers/staging/iio/TODO
+++ b/drivers/staging/iio/TODO
@@ -66,4 +66,4 @@
 2) Some device require indvidual docs.
 
 Contact: Jonathan Cameron <jic23@cam.ac.uk>.
-Mailing list: LKML.
+Mailing list: linux-iio@vger.kernel.org