DOC: add David Carlier as maintainer of da.c

David is willing to handle any issue related to da.c.
diff --git a/MAINTAINERS b/MAINTAINERS
index 16cb527..06fca15 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -54,3 +54,7 @@
 Maintainer: Simon Horman <horms@verge.net.au>
 Files: src/mailers.c, include/*/mailers.h
 
+DeviceAtlas device identification
+Maintainer: David Carlier <dcarlier@afilias.info>
+Files: src/da.c, include/*/da.h
+