Rename ssl_cli/srv.c

Rename ssl_cli.c and ssl_srv.c to reflect the fact
that they are TLS 1.2 specific now. Align there new
names with the TLS 1.3 ones.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 4256392..7b4311f 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -623,9 +623,9 @@
 #endif
 
 /* Adding guard for MBEDTLS_ECDSA_C to ensure no compile errors due
- * to guards also being in ssl_srv.c and ssl_cli.c. There is a gap
- * in functionality that access to ecdh_ctx structure is needed for
- * MBEDTLS_ECDSA_C which does not seem correct.
+ * to guards in client and server code. There is a gap in functionality that
+ * access to ecdh_ctx structure is needed for MBEDTLS_ECDSA_C which does not
+ * seem correct.
  */
 #if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
     mbedtls_ecdh_context ecdh_ctx;              /*!<  ECDH key exchange       */