Change code for styles and comments .etc

Remove useless code in union.
Rename functions and parameters.
Move definitions into othe files.

Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
diff --git a/library/ssl_tls13_client.c b/library/ssl_tls13_client.c
index c30d562..6deab2a 100644
--- a/library/ssl_tls13_client.c
+++ b/library/ssl_tls13_client.c
@@ -1607,7 +1607,7 @@
 {
     int ret;
 
-    ret = mbedtls_ssl_tls13_process_finished_in( ssl );
+    ret = mbedtls_ssl_tls13_process_finished_message( ssl );
     if( ret != 0 )
         return( ret );