ssl: Add early_data_count field

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 5b0a4b9..ee72179 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1105,6 +1105,7 @@
 #if defined(MBEDTLS_SSL_SRV_C)
     ssl->discard_early_data_record = MBEDTLS_SSL_EARLY_DATA_NO_DISCARD;
 #endif
+    ssl->early_data_count = 0;
 #endif /* MBEDTLS_SSL_EARLY_DATA */
 
     /* Initialize structures */