chore(2.7): update FVP version for v2.7 release

Updates common FVP model version from 11.16/16 to 11.17/21
Note: model build based on Linux64_GCC-9.3 instead of Linux64_GCC-6.4.

Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: Iec26571966bfc8c07ad2131aac4316ced41d21a6
diff --git a/model/css-rdv1.sh b/model/css-rdv1.sh
index a3956ed..bc807eb 100644
--- a/model/css-rdv1.sh
+++ b/model/css-rdv1.sh
@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 #
-# Copyright (c) 2020-2021, Arm Limited. All rights reserved.
+# Copyright (c) 2020-2022, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-set_model_path "$warehouse/SysGen/SubSystemModels/11.15/26/models/$model_flavour/FVP_RD_V1"
+set_model_path "$warehouse/SysGen/SubSystemModels/11.15/26/models/Linux64_GCC-6.4/FVP_RD_V1"
 
 cat <<EOF >"$model_param_file"
 -C board.flashloader0.fname=$fip_bin