ssl: Add early_data_count field

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 78395d2..15bd6fd 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1859,7 +1859,8 @@
                                                          *   within a single datagram.  */
 #endif /* MBEDTLS_SSL_PROTO_DTLS */
 
-#if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_SRV_C)
+#if defined(MBEDTLS_SSL_EARLY_DATA)
+#if defined(MBEDTLS_SSL_SRV_C)
     /*
      * One of:
      * MBEDTLS_SSL_EARLY_DATA_NO_DISCARD
@@ -1868,6 +1869,8 @@
      */
     uint8_t MBEDTLS_PRIVATE(discard_early_data_record);
 #endif
+    uint32_t MBEDTLS_PRIVATE(early_data_count);  /*!< Number of received/written early data bytes */
+#endif /* MBEDTLS_SSL_EARLY_DATA */
 
     /*
      * Record layer (outgoing data)