Phosphor IPMI FRU config stubs for most systems

Add native recipe stubs that (will) provide the the IPMI -> DBus
inventory mapping for the Phosphor IPMI FRU provider.

Change-Id: I21e76bc23ef1638ddcc318a179808521dea7f205
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-firestone/conf/machine/firestone.conf b/meta-firestone/conf/machine/firestone.conf
index 3f790a5..97d0bc2 100644
--- a/meta-firestone/conf/machine/firestone.conf
+++ b/meta-firestone/conf/machine/firestone.conf
@@ -10,3 +10,5 @@
 UBOOT_LOADADDRESS = "0x40008000"
 
 FLASH_SIZE = "32768"
+
+PREFERRED_PROVIDER_virtual/phosphor-ipmi-fru-config = "firestone-ipmi-inventory-map"