schemas: legacy: extract IpmbDevice

This allows to remove some properties from 'Aggregate' schema which are
no longer needed, since there is now a more specific schema to use.

Tested: Schema Validator Pass

Change-Id: Id8735de23d999d781f40a194e8fa8b6e24d978a8
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/schemas/global.json b/schemas/global.json
index f0f4715..31b40f5 100644
--- a/schemas/global.json
+++ b/schemas/global.json
@@ -100,6 +100,9 @@
                             "$ref": "legacy.json#/$defs/EmmcDevice"
                         },
                         {
+                            "$ref": "legacy.json#/$defs/IpmbDevice"
+                        },
+                        {
                             "$ref": "virtual_sensor.json#/$defs/VirtualSensor"
                         },
                         {
diff --git a/schemas/legacy.json b/schemas/legacy.json
index af4acb6..ffbf895 100644
--- a/schemas/legacy.json
+++ b/schemas/legacy.json
@@ -547,6 +547,31 @@
             "required": ["Name", "Type"],
             "type": "object"
         },
+        "IpmbDevice": {
+            "additionalProperties": false,
+            "properties": {
+                "Name": {
+                    "$ref": "#/$defs/Types/Name"
+                },
+                "Bus": {
+                    "$ref": "#/$defs/Types/Bus"
+                },
+                "Address": {
+                    "$ref": "#/$defs/Types/Address"
+                },
+                "Class": {
+                    "$ref": "#/$defs/Types/Class"
+                },
+                "PowerState": {
+                    "$ref": "#/$defs/Types/PowerState"
+                },
+                "Type": {
+                    "const": "IpmbDevice"
+                }
+            },
+            "required": ["Name", "Type", "Bus", "Address", "Class"],
+            "type": "object"
+        },
         "Aggregate": {
             "description": "Don't add additional properties to this schema. Consult README.schema for instructions on adding new Exposes element sub-schema.",
             "additionalProperties": false,
@@ -967,7 +992,6 @@
                     "SBRMI",
                     "SBTSI",
                     "smpro_hwmon",
-                    "IpmbDevice",
                     "IpmbPowerMonitor",
                     "MOSTempSensor",
                     "EEPROM",