KVM: arm64: nv: Honor MDCR_EL2.HLP

Counters that fall in the hypervisor range (i.e. N >= HPMN) have a
separate control for enabling 64 bit overflow. Take it into account.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241025182354.3364124-17-oliver.upton@linux.dev


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