ingrasys: Set LAYERSERIES_COMPAT

Starting with sumo, bitbake emits a warning if this variable is
not set.  Indicate sumo branch compatibility.

Change-Id: I231b7d38f4dea0e34f408bd6d721dd221abf3545
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/layer.conf b/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/layer.conf
index 12e9f7e..7467aa5 100644
--- a/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/layer.conf
+++ b/meta-openbmc-machines/meta-openpower/meta-ingrasys/meta-zaius/conf/layer.conf
@@ -7,3 +7,4 @@
 
 BBFILE_COLLECTIONS += "zaius"
 BBFILE_PATTERN_zaius = ""
+LAYERSERIES_COMPAT_zaius = "sumo"