hardknott: yocto release

Latest upstream yocto has moved on to the 3.3 hardknott release

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ieae36798d66d21c2c642931f06407d3bb2acf163
diff --git a/meta-intel-openbmc/conf/layer.conf b/meta-intel-openbmc/conf/layer.conf
index e515b5f..e2133be 100644
--- a/meta-intel-openbmc/conf/layer.conf
+++ b/meta-intel-openbmc/conf/layer.conf
@@ -8,5 +8,5 @@
 BBFILE_COLLECTIONS += "intel"
 BBFILE_PATTERN_intel = "^${LAYERDIR}/"
 LAYERVERSION_intel = "1"
-LAYERSERIES_COMPAT_intel = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_intel = "gatesgarth hardknott"
 LAYERDEPENDS_intel = "phosphor-layer"