dunfell: add support for new layer

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I9cf8dc3a6825c995d65c3ad969e70c56274626b9
diff --git a/conf/layer.conf b/conf/layer.conf
index 9741d26..cba3b77 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -7,4 +7,4 @@
 BBFILE_COLLECTIONS += "aspeed-layer"
 BBFILE_PATTERN_aspeed-layer := "^${LAYERDIR}/"
 LAYERVERSION_aspeed-layer = "1"
-LAYERSERIES_COMPAT_aspeed-layer = "warrior zeus"
+LAYERSERIES_COMPAT_aspeed-layer = "warrior zeus dunfell"