KVM: arm64: nvhe: Pass through PSCI v1.3 SYSTEM_OFF2 call

Pass through the SYSTEM_OFF2 function for hibernation, just like SYSTEM_OFF.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Miguel Luis <miguel.luis@oracle.com>
Link: https://lore.kernel.org/r/20241019172459.2241939-6-dwmw2@infradead.org


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