ci(fvp): enable secure memory option

Add the bp.secure_memory=1 FVP option in hftest to enable TZ memory
access controller.

Change-Id: I3924e245e44a0213e8a8f06482161e098930667d
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/test/hftest/hftest.py b/test/hftest/hftest.py
index 671daf4..5852016 100755
--- a/test/hftest/hftest.py
+++ b/test/hftest/hftest.py
@@ -343,7 +343,7 @@
             "-C", "pci.pci_smmuv3.mmu.SMMU_S_IDR2=0",
             "-C", "pci.pci_smmuv3.mmu.SMMU_S_IDR3=0",
             "-C", "pctl.startup=0.0.0.0",
-            "-C", "bp.secure_memory=0",
+            "-C", "bp.secure_memory=1",
             "-C", "cluster0.NUM_CORES=4",
             "-C", "cluster1.NUM_CORES=4",
             "-C", "cache_state_modelled=0",