Fix Doxygen marks

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 147e76d..d9d3e67 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1128,8 +1128,8 @@
 
     unsigned char MBEDTLS_PRIVATE(exported);
 
-    /*!< TLS version negotiated in the session. Used if and when renegotiating
-     *   or resuming a session instead of the configured minor TLS version.
+    /** TLS version negotiated in the session. Used if and when renegotiating
+     *  or resuming a session instead of the configured minor TLS version.
      */
     mbedtls_ssl_protocol_version MBEDTLS_PRIVATE(tls_version);
 
@@ -1514,19 +1514,19 @@
                                   renego_max_records is < 0           */
 #endif /* MBEDTLS_SSL_RENEGOTIATION */
 
-    /*!< Server: Negotiated TLS protocol version.
-     *   Client: Maximum TLS version to be negotiated, then negotiated TLS
-     *           version.
+    /** Server: Negotiated TLS protocol version.
+     *  Client: Maximum TLS version to be negotiated, then negotiated TLS
+     *          version.
      *
-     *   It is initialized as the maximum TLS version to be negotiated in the
-     *   ClientHello writing preparation stage and used throughout the
-     *   ClientHello writing. For a fresh handshake not linked to any previous
-     *   handshake, it is initialized to the configured maximum TLS version
-     *   to be negotiated. When renegotiating or resuming a session, it is
-     *   initialized to the previously negotiated TLS version.
+     *  It is initialized as the maximum TLS version to be negotiated in the
+     *  ClientHello writing preparation stage and used throughout the
+     *  ClientHello writing. For a fresh handshake not linked to any previous
+     *  handshake, it is initialized to the configured maximum TLS version
+     *  to be negotiated. When renegotiating or resuming a session, it is
+     *  initialized to the previously negotiated TLS version.
      *
-     *   Updated to the negotiated TLS version as soon as the ServerHello is
-     *   received.
+     *  Updated to the negotiated TLS version as soon as the ServerHello is
+     *  received.
      */
     mbedtls_ssl_protocol_version MBEDTLS_PRIVATE(tls_version);
 
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 020f062..6562c22 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -514,23 +514,23 @@
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
 #if defined(MBEDTLS_SSL_CLI_C)
-    /*!< Minimum TLS version to be negotiated.
+    /** Minimum TLS version to be negotiated.
      *
-     *   It is set up in the ClientHello writing preparation stage and used
-     *   throughout the ClientHello writing. Not relevant anymore as soon as
-     *   the protocol version has been negotiated thus as soon as the
-     *   ServerHello is received.
-     *   For a fresh handshake not linked to any previous handshake, it is
-     *   equal to the configured minimum minor version to be negotiated. When
-     *   renegotiating or resuming a session, it is equal to the previously
-     *   negotiated minor version.
+     *  It is set up in the ClientHello writing preparation stage and used
+     *  throughout the ClientHello writing. Not relevant anymore as soon as
+     *  the protocol version has been negotiated thus as soon as the
+     *  ServerHello is received.
+     *  For a fresh handshake not linked to any previous handshake, it is
+     *  equal to the configured minimum minor version to be negotiated. When
+     *  renegotiating or resuming a session, it is equal to the previously
+     *  negotiated minor version.
      *
-     *   There is no maximum TLS version field in this handshake context.
-     *   From the start of the handshake, we need to define a current protocol
-     *   version for the record layer which we define as the maximum TLS
-     *   version to be negotiated. The `tls_version` field of the SSL context is
-     *   used to store this maximum value until it contains the actual
-     *   negotiated value.
+     *  There is no maximum TLS version field in this handshake context.
+     *  From the start of the handshake, we need to define a current protocol
+     *  version for the record layer which we define as the maximum TLS
+     *  version to be negotiated. The `tls_version` field of the SSL context is
+     *  used to store this maximum value until it contains the actual
+     *  negotiated value.
      */
     mbedtls_ssl_protocol_version min_tls_version;
 #endif