arch-arm: Refactor ISA::clear by adding a ISA::clear32 method

The patch is also moving some initialization code to be used
by AArch64 as well since the registers are mapped to AArch64 ones.

Change-Id: I0089df25275434172c6e0e9cb125ee535c04d1b8
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/13997
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2 files changed