KVM: arm64: Disable SME traps for (h)VHE at setup

Ensure that SME traps are disabled for (h)VHE when setting up
EL2, as they are for nVHE.

Signed-off-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230724123829.2929609-5-tabba@google.com


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