Unify internal/external TLS protocol version enums

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 9be083a..384068a 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1099,6 +1099,14 @@
 
 #endif /* MBEDTLS_SSL_DTLS_SRTP */
 
+/** Human-friendly representation of the (D)TLS protocol version. */
+typedef enum
+{
+    MBEDTLS_SSL_VERSION_UNKNOWN, /*!< Context not in use or version not yet negotiated. */
+    MBEDTLS_SSL_VERSION_TLS1_2 = 0x0303, /*!< (D)TLS 1.2 */
+    MBEDTLS_SSL_VERSION_TLS1_3 = 0x0304, /*!< (D)TLS 1.3 */
+} mbedtls_ssl_protocol_version;
+
 /*
  * This structure is used for storing current session data.
  *
@@ -1161,14 +1169,6 @@
 #endif
 };
 
-/** Human-friendly representation of the (D)TLS protocol version. */
-typedef enum
-{
-    MBEDTLS_SSL_VERSION_UNKNOWN, /*!< Context not in use or version not yet negotiated. */
-    MBEDTLS_SSL_VERSION_1_2,     /*!< (D)TLS 1.2 */
-    MBEDTLS_SSL_VERSION_1_3,     /*!< (D)TLS 1.3 */
-} mbedtls_ssl_protocol_version;
-
 /*
  * Identifiers for PRFs used in various versions of TLS.
  */