pdr: Make find_entity_ref_in_tree() static

find_entity_ref_in_tree() was deprecated in v0.4.0, now mark it as
static like it should have been.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I64e335b7be56769254b277b0b6dbdfcd33b80571
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 413a23d..fd604b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@
 8. pdr: Remove pldm_pdr_add()
 9. pdr: Remove pldm_pdr_add_fru_record_set()
 10. pdr: Remove pldm_entity_association_pdr_add_from_node()
+11. pdr: Make find_entity_ref_in_tree() static
 
 ### Fixed
 
diff --git a/src/pdr.c b/src/pdr.c
index 4f7a3e3..a4c8291 100644
--- a/src/pdr.c
+++ b/src/pdr.c
@@ -958,9 +958,8 @@
 	return 0;
 }
 
-LIBPLDM_ABI_DEPRECATED
-void find_entity_ref_in_tree(pldm_entity_node *tree_node, pldm_entity entity,
-			     pldm_entity_node **node)
+static void find_entity_ref_in_tree(pldm_entity_node *tree_node,
+				    pldm_entity entity, pldm_entity_node **node)
 {
 	bool is_entity_container_id;
 	bool is_entity_instance_num;