correct the name of Inventory.Item.Bmc interface

As defined in the PDIs [1], the correct name of this interface is
Inventory.Item.Bmc (not BMC). This commit corrects all configuration
that are using incorrect interface name.

[1] https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/yaml/xyz/openbmc_project/Inventory/Item/Bmc.interface.yaml

Change-Id: Icc9b4b33725999a72cd925fd0f0e5995aacadcdc
Signed-off-by: Thang Tran <thuutran@amperecomputing.com>
diff --git a/schemas/openbmc-dbus.json b/schemas/openbmc-dbus.json
index 12c974b..d455102 100644
--- a/schemas/openbmc-dbus.json
+++ b/schemas/openbmc-dbus.json
@@ -156,7 +156,7 @@
                             "additionalProperties": false,
                             "type": "object"
                         },
-                        "BMC": {
+                        "Bmc": {
                             "additionalProperties": false,
                             "type": "object"
                         },