Changeset [1] introduced a new CpuCluster abstraction. This requires some changes to the Arm `starter_se.py` and `devices.py` configurations to accommodate the new structure. [1] https://gem5-review.googlesource.com/c/public/gem5/+/65891 Change-Id: I55fdd383c96286d179724e0f50771e2b5daaa6d7 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/69679 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>