KVM: arm64: nv: Plumb TLBI S1E2 into system instruction dispatch

Now that we have to handle TLBI S1E2 in the core code, plumb the
sysinsn dispatch code into it, so that these instructions don't
just UNDEF anymore.

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20250514103501.2225951-15-maz@kernel.org


Signed-off-by: Marc Zyngier <maz@kernel.org>