Add Microcode property to CpuCore Interface

"Core" is one of the "ProcessorType" under the Processor Redfish Schema.
https://redfish.dmtf.org/schemas/v1/Processor.v1_12_0.json

Microcode is often exposed at the core level, expose it to CpuCore.

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: Id7e3f66431883b5f25322e3f055c0c6ab84b8ece
diff --git a/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml
index a5d2f1e..18168de 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml
+++ b/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml
@@ -1,2 +1,8 @@
 description: >
     Implement to provide CPU core attributes.
+properties:
+    - name: Microcode
+      type: string
+      description: >
+          The microcode information for this core.
+          Should be left empty if this is not supported.