Inventory: Add functional/presence sensor support for palmetto

Add the config.yaml which defines the mapping between
sensor numbers and Dbus Properties(present,functional)
for CPU,Core and DIMM inventory objects.

Change-Id: I5d720b09135c2b7b95e705a607c9f2a18373ec54
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
diff --git a/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory%.bbappend b/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory%.bbappend
new file mode 100644
index 0000000..72d991c
--- /dev/null
+++ b/meta-palmetto/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory%.bbappend
@@ -0,0 +1 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"