Added PSA_ERROR_STORAGE_FAILURE to psa_mac_sign_setup
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 1fb1515..a48e7e7 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -1332,6 +1332,8 @@
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE
* \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * The key could not be retrieved from storage.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (already set up and not
* subsequently completed).