arm: Use static_cast to get access the ARM specific ISA functions.

Change-Id: I8d237fa60c0fc17c97ed351afd0fa3c623262f0d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25006
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
4 files changed