Fix LAYERSERIES_COMPAT warning for meta-intel.

Add LAYERSERIES_COMPAT_xx lines in layer.conf to specify
OpenEmbedded-Core version that we are compatible with.

Change-Id: Ia5f4569d6997742e2b0205b6eb8e850498f6895e
Signed-off-by: Jia, Chunhui <chunhui.jia@linux.intel.com>
diff --git a/conf/layer.conf b/conf/layer.conf
index b19eca2..edc79f8 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -8,3 +8,4 @@
 BBFILE_COLLECTIONS += "intel"
 BBFILE_PATTERN_intel = ""
 LAYERVERSION_intel = "1"
+LAYERSERIES_COMPAT_intel = "sumo"