dunfell: add support for new layer

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Id0439d19ad75e1cec09ace258ff4fa98a00ca7ca
diff --git a/conf/layer.conf b/conf/layer.conf
index bc7b5de..786b647 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -7,4 +7,4 @@
 
 BBFILE_COLLECTIONS += "facebook-layer"
 BBFILE_PATTERN_facebook-layer := "^${LAYERDIR}/"
-LAYERSERIES_COMPAT_facebook-layer := "warrior zeus"
+LAYERSERIES_COMPAT_facebook-layer := "warrior zeus dunfell"