configurations: minerva: add SparePartNumber

Support xyz.openbmc_project.Inventory.Decorator.Asset with
SparePartNumber in minerva.

Change-Id: I85244825e85cc0cca3b32d5b82210a1825b45bb2
Signed-off-by: Yi-Shum <EasonChen1@quantatw.com>
diff --git a/configurations/minerva_cmm.json b/configurations/minerva_cmm.json
index 04189a8..4e26736 100644
--- a/configurations/minerva_cmm.json
+++ b/configurations/minerva_cmm.json
@@ -259,7 +259,8 @@
         "Manufacturer": "$BOARD_MANUFACTURER",
         "Model": "$BOARD_PRODUCT_NAME",
         "PartNumber": "$BOARD_PART_NUMBER",
-        "SerialNumber": "$BOARD_SERIAL_NUMBER"
+        "SerialNumber": "$BOARD_SERIAL_NUMBER",
+        "SparePartNumber": "$BOARD_INFO_AM1"
     },
     "xyz.openbmc_project.Inventory.Item.NetworkInterface": {
         "MACAddress": "$CHASSIS_INFO_AM2"