arch-arm: Move RO values from ISA::read to the reset field

This is simplyfying the ISA::readMiscReg, and it is stopping
us from recomputing values that won't change throughout the
simulation

Change-Id: I62270cdb59f39b8a143e9554c8beaa8cd15824aa
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/+/70558
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
2 files changed