pk: fix documentation of mbedtls_pk_setup_opaque()
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index a239270..52f4cc6 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -390,7 +390,8 @@
* \return \c 0 on success.
* \return #MBEDTLS_ERR_PK_BAD_INPUT_DATA on invalid input (context already
* used, invalid key identifier).
- * \return #MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE if the key is not an ECC key pair.
+ * \return #MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE if the key is not an ECC or
+ * RSA key pair.
* \return #MBEDTLS_ERR_PK_ALLOC_FAILED on allocation failure.
*/
int mbedtls_pk_setup_opaque(mbedtls_pk_context *ctx,