tests: Fix error in Arm test

I missed this one in the last changeset.

Change-Id: I71d7fa2ac4ff36d4aef5d950e6ed8973ffc32a4e
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63991
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Melissa Jost <melissakjost@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
1 file changed