arch-arm: Implement LoadAcquire/StoreRelease in AArch32

This patch is implementing LoadAcquire/StoreRelease instructions in
AArch32, which were added in ARMv8-A only and where not present in
ARMv7.

Change-Id: I5e26459971d0b183a955cd7b0c9c7eaffef453be
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/15817
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
3 files changed