KVM: arm64: print Hyp mode

Print which of the hyp modes is being used (hVHE, nVHE).

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240209103719.3813599-1-joey.gouly@arm.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>