Documentation clarification after review

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
diff --git a/library/psa_crypto_driver_wrappers.c b/library/psa_crypto_driver_wrappers.c
index 2a3075b..11160d8 100644
--- a/library/psa_crypto_driver_wrappers.c
+++ b/library/psa_crypto_driver_wrappers.c
@@ -229,8 +229,8 @@
     }
 }
 
-/** Get the key buffer size for the key material of a generated key in the
- *  case of an opaque driver without storage.
+/** Get the key buffer size required to store the key material of a key
+ *  associated with an opaque driver without storage.
  *
  * \param[in] attributes  The key attributes.
  * \param[out] key_buffer_size  Minimum buffer size to contain the key material