KVM: cleanup (physical) CPU hotplug
KVM: cleanup (physical) CPU hotplug

Remove the useless argument, and do not do anything if there are no
VMs running at the time of the hotplug.

Cc: 8c364499b63077b3209a702ecef6203a4c06f926@vger.kernel.org
Cc: 03189597947f75187c4136ade35aec34feed9dc1@redhat.com
Cc: a5b45c9af271d077f30d36aa7d9b988eed9d56eb@siemens.com
Reviewed-by: Gleb Natapov <03189597947f75187c4136ade35aec34feed9dc1@redhat.com>
Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs