arch-arm: Remove unnecessary case in ISA::readMiscReg Change-Id: I8b95a75fbfec2626fbe8b455ae9b3f30acda538f Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Richard Cooper <richard.cooper@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/70564 Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>