tests: Enable DVM in realview64-o3-dual-ruby.py

Change-Id: I3b4cec279e620ee416c3ecb34e45eec1d34b0166
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/59871
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests/gem5/configs/realview64-o3-dual-ruby.py

@@ -40,4 +40,5 @@ root = LinuxArmFSSystem(mem_mode='timing',
                         mem_class=DDR3_1600_8x8,
                         cpu_class=O3CPU,
                         num_cpus=2,
+                        enable_dvm=True,
                         use_ruby=True).create_root()