ci(fvp): enable FEAT_LS64_ACCDATA

FEAT_LS64_ACCDATA extends the existing FEAT_LS64 by introducing an EL1
system register. Since tf-a-tests now contains a test for this feature,
enable it for the FVP runs by setting accelerator_support_level to 3.

Change-Id: Ic438cf898dae44ccf1ea83d5737be2020f3cda7f
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/model/base-aemva-common.sh b/model/base-aemva-common.sh
index b67b043..8192234 100644
--- a/model/base-aemva-common.sh
+++ b/model/base-aemva-common.sh
@@ -444,7 +444,7 @@
 # Accelerator support level enabled
 if [ "$accelerator_support_level" != "0" ]; then
 	cat <<EOF >>"$model_param_file"
--C cluster0.arm_v8_7_accelerator_support_level=1
+-C cluster0.arm_v8_7_accelerator_support_level="$accelerator_support_level"
 EOF
 fi
 
@@ -632,7 +632,7 @@
 # Accelerator support level enabled
 if [ "$accelerator_support_level" != "0" ]; then
 	cat <<EOF >>"$model_param_file"
--C cluster1.arm_v8_7_accelerator_support_level=1
+-C cluster1.arm_v8_7_accelerator_support_level="$accelerator_support_level"
 EOF
 fi