platform: Stabilise related decode_entity_auxiliary_names_pdr*() APIs

See usage example at:
https://gerrit.openbmc.org/c/openbmc/pldm/+/72610

Change-Id: I16c6d42ad11afa59b04676fa187f5ea0764d1880
Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com>
diff --git a/src/dsp/platform.c b/src/dsp/platform.c
index 3d27802..4a5388c 100644
--- a/src/dsp/platform.c
+++ b/src/dsp/platform.c
@@ -2693,7 +2693,7 @@
 	return pldm_msgbuf_destroy_consumed(buf);
 }
 
-LIBPLDM_ABI_TESTING
+LIBPLDM_ABI_STABLE
 int decode_entity_auxiliary_names_pdr(
 	const void *data, size_t data_length,
 	struct pldm_entity_auxiliary_names_pdr *pdr, size_t pdr_length)
@@ -2805,7 +2805,7 @@
 	return 0;
 }
 
-LIBPLDM_ABI_TESTING
+LIBPLDM_ABI_STABLE
 int decode_pldm_entity_auxiliary_names_pdr_index(
 	struct pldm_entity_auxiliary_names_pdr *pdr)
 {