FROMLIST: KVM: arm64: nVHE: Add EL2h sync exception handler

Introduce a handler for EL2h synchronous exceptions distinct from
handlers for other "invalid" exceptions when running with the nVHE host
vector. This will allow a future patch to handle kCFI (synchronous)
errors without affecting other classes of exceptions.

Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>

Bug: 278010198
Link: https://lore.kernel.org/r/20240510112645.3625702-6-ptosi@google.com


Change-Id: I0841432160c2236a78a9d07a999599dabccd4e81
Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>