refactor(rdv1): enable sve for rdv1 tests

11.26 FVP_RD_V1 has by default enabled SVE and has no option to
disable it. The test software combination relies on this, eventually
will cause failures from lower-El's expecting SVE to be available but
not enabled from EL3, leading to a EL3 panic when lower EL software
tries to use them, so enable SVE for this test.

Remove hard-coded model version and use top level defined model version
and model build.

Change-Id: I0575910889af51b31844d9c280ce04051a34ada6
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
(cherry picked from commit aefbe27dac9dbfeb7f1e1a3ab49e6348d0198867)
diff --git a/model/css-rdv1.sh b/model/css-rdv1.sh
index c7a79ab..83d2d0a 100644
--- a/model/css-rdv1.sh
+++ b/model/css-rdv1.sh
@@ -5,7 +5,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-set_model_path "$warehouse/SysGen/SubSystemModels/11.17/29/models/$model_flavour/FVP_RD_V1"
+set_model_path "$warehouse/SysGen/SubSystemModels/$model_version/$model_build/models/$model_flavour/FVP_RD_V1"
 
 cat <<EOF >"$model_param_file"
 -C css.scp.terminal_uart_aon.start_port=5000