Change PSA_DH_GROUP_CUSTOM to not be in the vendor-defined range
@@ -428,8 +428,9 @@ psa_status_t mbedtls_psa_inject_entropy(const uint8_t *seed,
* #PSA_KEY_TYPE_DH_KEY_PAIR(#PSA_DH_GROUP_CUSTOM), the group data comes
* from domain parameters set by psa_set_key_domain_parameters().
*/
-/* This value is reserved for private use in the TLS named group registry. */
-#define PSA_DH_GROUP_CUSTOM ((psa_dh_group_t) 0x01fc)
+/* This value is a deprecated value meaning an explicit curve in the IANA
+ * registry. */
+#define PSA_DH_GROUP_CUSTOM ((psa_dh_group_t) 0xff01)
/**
