treewide: support yocto kirkstone release

* Deprecate N-1 release (hardknott).
* Enable N+1 release (kirkstone).

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I39e027e02dab64b4390b46ffbd9c299c858f403e
diff --git a/meta-fii/conf/layer.conf b/meta-fii/conf/layer.conf
index ea180d4..9e5d696 100644
--- a/meta-fii/conf/layer.conf
+++ b/meta-fii/conf/layer.conf
@@ -5,4 +5,4 @@
             ${LAYERDIR}/recipes-*/*/*.bbappend"
 BBFILE_COLLECTIONS += "fii-layer"
 BBFILE_PATTERN_fii-layer := "^${LAYERDIR}/"
-LAYERSERIES_COMPAT_fii-layer = "hardknott honister"
+LAYERSERIES_COMPAT_fii-layer = "honister kirkstone"