Fixup inventory generation dependencies

Resolves openbmc/openbmc#567.

Change-Id: I68e8e726f839038a6a256ff18a88d936ab0af3e4
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-palmetto/conf/machine/palmetto.conf b/meta-palmetto/conf/machine/palmetto.conf
index c43c588..9c60801 100644
--- a/meta-palmetto/conf/machine/palmetto.conf
+++ b/meta-palmetto/conf/machine/palmetto.conf
@@ -13,3 +13,5 @@
 
 PHOSPHOR_MRW_URI = "git://github.com/open-power/palmetto-xml"
 PHOSPHOR_MRW_REV = "82818682f2c2009c30d700df6d5f8897a3096e4f"
+
+PREFERRED_PROVIDER_virtual/obmc-inventory-data = "obmc-inventory"