The RTC and HPET modes for the QEMU emulation tick have been dropped
almost 9 years ago, in commit 25f3151ece1d5881826232bebccc21b588d4e03e.
Do not allow them in the devices cgroup policy.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>