KVM: arm64: Use guest ID register values for the sake of emulation

Since KVM now supports per-VM ID registers, use per-VM ID register
values for the sake of emulation for DBGDIDR and LORegion.

Signed-off-by: Jing Zhang <jingzhangos@google.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231003230408.3405722-4-oliver.upton@linux.dev


Signed-off-by: Oliver Upton <oliver.upton@linux.dev>