oem: ibm: Support for the Real SAI entity id

This commit adds the Real SAI (System Attention Indicator) oem
entity id.

Real SAI is a physical led indicator which lights up whenever
there is a platform error (originated from BMC) or a partition
error that is not mapped to any physical FRU (Field Replaceable Unit).

The pldm commit that uses this value is
https://gerrit.openbmc.org/c/openbmc/pldm/+/48906

Change-Id: I3e070303c1a8aed236be05fbf79a402f6b1322f8
Signed-off-by: Jayashankar Padath <jayashankar.padath@in.ibm.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f417653..be236be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@
 12. entity: Add enum for Network Interface Connectors and Network Ports
     Connection Types
 13. pdr: Add decode_numeric_effecter_pdr_data()
+14. oem: ibm: Support for the Real SAI entity id
 
 ### Changed
 
diff --git a/include/libpldm/oem/ibm/entity.h b/include/libpldm/oem/ibm/entity.h
index 5b84ff9..bc78f7b 100644
--- a/include/libpldm/oem/ibm/entity.h
+++ b/include/libpldm/oem/ibm/entity.h
@@ -9,6 +9,7 @@
 enum pldm_oem_ibm_entity_id_codes {
 	PLDM_OEM_IBM_ENTITY_TPM = 24576,
 	PLDM_OEM_IBM_ENTITY_FIRMWARE_UPDATE = 24577,
+	PLDM_OEM_IBM_ENTITY_REAL_SAI = 24581,
 };
 
 #ifdef __cplusplus