configurations: Updates to Mt.Mitchell

This commit modifies configurations of ADCSensors, and adds more
interfaces to the motherboard and BMC board inventory.

Signed-off-by: Chau Ly <chaul@amperecomputing.com>
Change-Id: I974a02bffd253cb33de8c6fb091d0be12cab0e8d
diff --git a/configurations/mtmitchell_bmc.json b/configurations/mtmitchell_bmc.json
index d3e6498..cbc0b82 100644
--- a/configurations/mtmitchell_bmc.json
+++ b/configurations/mtmitchell_bmc.json
@@ -118,9 +118,17 @@
     "Probe": "xyz.openbmc_project.FruDevice({'BOARD_PRODUCT_NAME': '.*Mitchell BMC*'})",
     "Type": "Board",
     "xyz.openbmc_project.Inventory.Decorator.Asset": {
+        "BuildDate": "$BOARD_MANUFACTURE_DATE",
         "Manufacturer": "$BOARD_MANUFACTURER",
         "Model": "$BOARD_PRODUCT_NAME",
         "PartNumber": "$BOARD_PART_NUMBER",
         "SerialNumber": "$BOARD_SERIAL_NUMBER"
+    },
+    "xyz.openbmc_project.Inventory.Decorator.Replaceable": {
+        "FieldReplaceable": false,
+        "HotPluggable": false
+    },
+    "xyz.openbmc_project.Inventory.Item.NetworkInterface": {
+        "MACAddress": "$BOARD_INFO_AM1"
     }
 }