Add gatesgarth to LAYERSERIES_COMPAT for Yocto 3.2, removed older releases

Added gategarth to LAYERS_SERIES_COMPAT_swupdate
Removed rocko sumo thud warrior zeus
Signed-off-by: Geoff Parker <geoffrey.parker@arthrex.com>

conf/layer.conf

@@ -9,6 +9,6 @@ BBFILE_COLLECTIONS += "swupdate"
 BBFILE_PATTERN_swupdate := "^${LAYERDIR}/"
 BBFILE_PRIORITY_swupdate = "6"
 
-LAYERSERIES_COMPAT_swupdate = "rocko sumo thud warrior zeus dunfell"
+LAYERSERIES_COMPAT_swupdate = "dunfell gatesgarth"
 
 LAYERDEPENDS_swupdate = "openembedded-layer"