aggregation: add satellite controller schema

This schema will be utilized to add remote satellite controllers to a
users system.

bmcweb already has extensive support for utilizing this object. More
information can be found in the following:
  https://gerrit.openbmc.org/c/openbmc/bmcweb/+/57925

Tested:
- Confirmed a system utilizing new schema worked as expected

Change-Id: Id6172d4f5d2243b95331c5d9076e809ef21de219
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/schemas/global.json b/schemas/global.json
index a7aa1a7..164a2ed 100644
--- a/schemas/global.json
+++ b/schemas/global.json
@@ -24,6 +24,9 @@
                     "$ref": "pid_zone.json#/definitions/PidZone"
                 },
                 {
+                    "$ref": "satellite_controller.json#/definitions/SatelliteController"
+                },
+                {
                     "$ref": "stepwise.json#/definitions/Stepwise"
                 },
                 {