meta-asrock: catch up with yocto updates

Override variable syntax change, honister compat, and a CONF_VERSION
bump.

Fixes openbmc/openbmc#3816.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Change-Id: Ia41d159d8118e5dba4b213bb0f7c2d61753c8ad3
diff --git a/meta-asrock/meta-e3c246d4i/conf/layer.conf b/meta-asrock/meta-e3c246d4i/conf/layer.conf
index 6b8e771..8185611 100644
--- a/meta-asrock/meta-e3c246d4i/conf/layer.conf
+++ b/meta-asrock/meta-e3c246d4i/conf/layer.conf
@@ -7,4 +7,4 @@
 
 BBFILE_COLLECTIONS += "e3c246d4i-layer"
 BBFILE_PATTERN_e3c246d4i-layer = "^${LAYERDIR}/"
-LAYERSERIES_COMPAT_e3c246d4i-layer = "hardknott"
+LAYERSERIES_COMPAT_e3c246d4i-layer = "hardknott honister"