Doc: fix doxygen comments.

Some existing doxygen comments resulted in bad or bad looking
documentation. These were fixed.

Change-Id: I20ab5a81c54d3bdc0e056965ad7de293d472cdf9
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
diff --git a/interface/include/tfm_crypto_defs.h b/interface/include/tfm_crypto_defs.h
index 4e532ca..4573811 100644
--- a/interface/include/tfm_crypto_defs.h
+++ b/interface/include/tfm_crypto_defs.h
@@ -81,7 +81,7 @@
  * \brief A macro to translate psa_status_t values to the corresponding return
  *        values for the TFM Crypto service
  *
- * \return Values specified by \ref enum tfm_crypto_err_t
+ * \return Values specified by \ref tfm_crypto_err_t
  *
  */
 #define PSA_STATUS_TO_TFM_CRYPTO_ERR(val) \