meta-yadro: add dunfell compatibility

OE-core is switching over to dunfell.
This adds dunfell compatibility for meta-yadro, meta-vesnin and
meta-ncole layers.

(From meta-yadro rev: 5149d928b3be14a819e8424f2df4502f0b9afc14)

Change-Id: I73ca9cdeb7aca395eb9c7323faa0d46941f3ea4b
Signed-off-by: Alexander Filippov <a.filippov@yadro.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-yadro/conf/layer.conf b/meta-yadro/conf/layer.conf
index 09b216d..0a5f6f2 100644
--- a/meta-yadro/conf/layer.conf
+++ b/meta-yadro/conf/layer.conf
@@ -9,4 +9,4 @@
 BBFILE_PATTERN_yadro-layer = "^${LAYERDIR}/"
 BBFILE_PATTERN_IGNORE_EMPTY_yadro-layer = "1"
 
-LAYERSERIES_COMPAT_yadro-layer = "warrior zeus"
+LAYERSERIES_COMPAT_yadro-layer = "warrior zeus dunfell"