aspeed: Append -layer to bbfile collection name

This seems to be the upstream convention.  Update to match.

Change-Id: I51557baebee8890d983d878779a5dd76ffa309be
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openbmc-bsp/meta-aspeed/conf/layer.conf b/meta-openbmc-bsp/meta-aspeed/conf/layer.conf
index 9e7bd18..3a530db 100644
--- a/meta-openbmc-bsp/meta-aspeed/conf/layer.conf
+++ b/meta-openbmc-bsp/meta-aspeed/conf/layer.conf
@@ -4,6 +4,6 @@
 BBFILES += "${LAYERDIR}/common/recipes-*/*/*.bb \
             ${LAYERDIR}/common/recipes-*/*/*.bbappend"
 
-BBFILE_COLLECTIONS += "aspeed"
-BBFILE_PATTERN_aspeed = ""
-LAYERVERSION_aspeed = "1"
+BBFILE_COLLECTIONS += "aspeed-layer"
+BBFILE_PATTERN_aspeed-layer = ""
+LAYERVERSION_aspeed-layer = "1"