psa: Fix references to macros in comments

This commit tries to fix the usage of #MACRO_NAME
to reference macros in comments.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/psa_crypto_storage.c b/library/psa_crypto_storage.c
index 2ab5903..1ebd20e 100644
--- a/library/psa_crypto_storage.c
+++ b/library/psa_crypto_storage.c
@@ -90,9 +90,9 @@
  * \param[out] data         Buffer where the data is to be written.
  * \param data_size         Size of the \c data buffer in bytes.
  *
- * \retval PSA_SUCCESS
- * \retval PSA_ERROR_STORAGE_FAILURE
- * \retval PSA_ERROR_DOES_NOT_EXIST
+ * \retval #PSA_SUCCESS
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_ERROR_DOES_NOT_EXIST
  */
 static psa_status_t psa_crypto_storage_load(
     const mbedtls_svc_key_id_t key, uint8_t *data, size_t data_size )
@@ -137,10 +137,10 @@
  * \param data_length   The number of bytes
  *                      that make up the data.
  *
- * \retval PSA_SUCCESS
- * \retval PSA_ERROR_INSUFFICIENT_STORAGE
- * \retval PSA_ERROR_STORAGE_FAILURE
- * \retval PSA_ERROR_ALREADY_EXISTS
+ * \retval #PSA_SUCCESS
+ * \retval #PSA_ERROR_INSUFFICIENT_STORAGE
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_ERROR_ALREADY_EXISTS
  */
 static psa_status_t psa_crypto_storage_store( const mbedtls_svc_key_id_t key,
                                               const uint8_t *data,
@@ -210,8 +210,8 @@
  *                          is to be obtained.
  * \param[out] data_length  The number of bytes that make up the data.
  *
- * \retval PSA_SUCCESS
- * \retval PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_SUCCESS
+ * \retval #PSA_ERROR_STORAGE_FAILURE
  */
 static psa_status_t psa_crypto_storage_get_data_length(
     const mbedtls_svc_key_id_t key,