Update return documentation of psa_pake_abort()

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index a804b06..2f1fefb 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -1768,6 +1768,7 @@
  * \param[in,out] operation    The operation to abort.
  *
  * \retval #PSA_SUCCESS
+ *         Success.
  * \retval #PSA_ERROR_COMMUNICATION_FAILURE
  * \retval #PSA_ERROR_CORRUPTION_DETECTED
  * \retval #PSA_ERROR_BAD_STATE