add langdale to compatible layer

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I65febeeec11e6e5b40ee728f42cfbe77023dae1e
diff --git a/meta-phosphor/conf/layer.conf b/meta-phosphor/conf/layer.conf
index a11ff8a..8b5a2b1 100644
--- a/meta-phosphor/conf/layer.conf
+++ b/meta-phosphor/conf/layer.conf
@@ -12,7 +12,7 @@
 LAYERDEPENDS_phosphor-layer += "openembedded-layer"
 LAYERDEPENDS_phosphor-layer += "meta-python"
 LAYERDEPENDS_phosphor-layer += "networking-layer"
-LAYERSERIES_COMPAT_phosphor-layer = "honister kirkstone"
+LAYERSERIES_COMPAT_phosphor-layer = "kirkstone langdale"
 
 IMAGE_FEATURES[validitems] += "tools-profile"