KVM: arm64: Initialize feature id registers for protected VMs

The hypervisor maintains the state of protected VMs. Initialize
the values for feature ID registers for protected VMs, to be used
when setting traps and when advertising features to protected
VMs.

Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://lore.kernel.org/r/20241216105057.579031-7-tabba@google.com


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