New recipe for openpower-inventory-upload

This script uploads the BMC inventory to a partition in PNOR
on POWER systems for inclusion in the host device tree.
diff --git a/meta-openbmc-machines/meta-openpower/conf/layer.conf b/meta-openbmc-machines/meta-openpower/conf/layer.conf
index 46c5a5d..6824543 100644
--- a/meta-openbmc-machines/meta-openpower/conf/layer.conf
+++ b/meta-openbmc-machines/meta-openpower/conf/layer.conf
@@ -1,8 +1,10 @@
 # We have a conf and classes directory, add to BBPATH
 BBPATH .= ":${LAYERDIR}"
 
+# We have recipes-* directories, add to BBFILES
 BBFILES += "${LAYERDIR}/common/recipes-*/*/*.bb \
             ${LAYERDIR}/common/recipes-*/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "openpower"
-BBFILE_PATTERN_openpower = ""
+BBFILE_PATTERN_openpower = "^${LAYERDIR}/"
+LAYERVERSION_openpower = "1"