schemas: legacy: extract IpmbPowerMonitor

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: I04a27709c25f3bd4cc5f5b2c14e8f87837e9c9eb
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/schemas/global.json b/schemas/global.json
index 31b40f5..c3da46a 100644
--- a/schemas/global.json
+++ b/schemas/global.json
@@ -103,6 +103,9 @@
                             "$ref": "legacy.json#/$defs/IpmbDevice"
                         },
                         {
+                            "$ref": "legacy.json#/$defs/IpmbPowerMonitor"
+                        },
+                        {
                             "$ref": "virtual_sensor.json#/$defs/VirtualSensor"
                         },
                         {
diff --git a/schemas/legacy.json b/schemas/legacy.json
index ffbf895..b4e2f4e 100644
--- a/schemas/legacy.json
+++ b/schemas/legacy.json
@@ -572,6 +572,28 @@
             "required": ["Name", "Type", "Bus", "Address", "Class"],
             "type": "object"
         },
+        "IpmbPowerMonitor": {
+            "additionalProperties": false,
+            "properties": {
+                "Name": {
+                    "$ref": "#/$defs/Types/Name"
+                },
+                "Bus": {
+                    "$ref": "#/$defs/Types/Bus"
+                },
+                "Address": {
+                    "$ref": "#/$defs/Types/Address"
+                },
+                "Class": {
+                    "$ref": "#/$defs/Types/Class"
+                },
+                "Type": {
+                    "const": "IpmbPowerMonitor"
+                }
+            },
+            "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,
@@ -992,7 +1014,6 @@
                     "SBRMI",
                     "SBTSI",
                     "smpro_hwmon",
-                    "IpmbPowerMonitor",
                     "MOSTempSensor",
                     "EEPROM",
                     "BMC",