Revert "arm, kvm: fix double lock on cpu_add_remove_lock"

Revert "arm, kvm: fix double lock on cpu_add_remove_lock"

This reverts commit d77503eadd2f16f2900b9be79a1dc6f37e8cd579.  The whole
register cpu hotplug fix series has not been applied, so LSK is released
without this fix.  If we ever include that series in LSK later, then
this can be fixed later too.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit 553f809e23f00976caea7a1ebdabaa58a6383e7d)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>