KVM: arm64: nv: Respect virtual HCR_EL2.TWx setting

Forward exceptions due to WFI or WFE instructions to the virtual EL2 if
they are not coming from the virtual EL2 and virtual HCR_EL2.TWx is set.

Signed-off-by: Jintack Lim <jintack.lim@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250225172930.1850838-12-maz@kernel.org


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