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-x86/conf/layer.conf b/meta-x86/conf/layer.conf
index d10e210..93bc497 100644
--- a/meta-x86/conf/layer.conf
+++ b/meta-x86/conf/layer.conf
@@ -3,4 +3,4 @@
 
 BBFILE_COLLECTIONS += "obmc_machines_x86"
 BBFILE_PATTERN_obmc_machines_x86 = ""
-LAYERSERIES_COMPAT_obmc_machines_x86 = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_obmc_machines_x86 = "gatesgarth hardknott"