arch-arm: Fix RW permission access for _EL12 registers

_EL12 registers are supposed to be used in VHE only to access _EL1
registers. They are not accessible at EL1

Change-Id: I33c0a2b689e523d05712f0242da48e1b73580d6d
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58114
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed