meta-hpe: update Yocto compat for gatesgarth

The next release of Yocto is soon and most of the upstream
layers have switched support strings for it.  Support layer
compat for gatesgarth (current) and dunfell (previous).

(From meta-hpe rev: 8a63411fb4d67d675f4ad3790ecbb1d2ec078bea)

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I730e1762c251a9977814b2593850f32cc09b3377
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-hpe/meta-dl360poc/conf/layer.conf b/meta-hpe/meta-dl360poc/conf/layer.conf
index 4627564..ef937d3 100644
--- a/meta-hpe/meta-dl360poc/conf/layer.conf
+++ b/meta-hpe/meta-dl360poc/conf/layer.conf
@@ -7,4 +7,4 @@
 
 BBFILE_COLLECTIONS += "dl360poc-layer"
 BBFILE_PATTERN_dl360poc-layer := "^${LAYERDIR}/"
-LAYERSERIES_COMPAT_dl360poc-layer = "zeus warrior dunfell"
+LAYERSERIES_COMPAT_dl360poc-layer = "dunfell gatesgarth"
diff --git a/meta-hpe/meta-gxp/conf/layer.conf b/meta-hpe/meta-gxp/conf/layer.conf
index eafb7ba..af9f8af 100644
--- a/meta-hpe/meta-gxp/conf/layer.conf
+++ b/meta-hpe/meta-gxp/conf/layer.conf
@@ -7,6 +7,6 @@
 BBFILE_COLLECTIONS += "gxp-layer"
 BBFILE_PATTERN_gxp-layer = "^${LAYERDIR}/"
 LAYERVERSION_gxp-layer = "1"
-LAYERSERIES_COMPAT_gxp-layer = "zeus warrior dunfell"
+LAYERSERIES_COMPAT_gxp-layer = "dunfell gatesgarth"
 
 GXPBASE = '${@os.path.normpath("${LAYERDIR}/")}'