Replace PSA error code definitions with the ones defined in PSA spec
diff --git a/library/psa_crypto_storage_backend.h b/library/psa_crypto_storage_backend.h
index 47896b8..83bd2f3 100644
--- a/library/psa_crypto_storage_backend.h
+++ b/library/psa_crypto_storage_backend.h
@@ -54,7 +54,7 @@
*
* \retval PSA_SUCCESS
* \retval PSA_ERROR_STORAGE_FAILURE
- * \retval PSA_ERROR_EMPTY_SLOT
+ * \retval PSA_ERROR_DOES_NOT_EXIST
*/
psa_status_t psa_crypto_storage_load( const psa_key_id_t key, uint8_t *data,
size_t data_size );
@@ -73,7 +73,7 @@
* \retval PSA_SUCCESS
* \retval PSA_ERROR_INSUFFICIENT_STORAGE
* \retval PSA_ERROR_STORAGE_FAILURE
- * \retval PSA_ERROR_OCCUPIED_SLOT
+ * \retval PSA_ERROR_ALREADY_EXISTS
*/
psa_status_t psa_crypto_storage_store( const psa_key_id_t key,
const uint8_t *data,