sched_mc_powersaving and arch_power off by default.
Some corrections
net/bluetooth/hci_conn.c: gcc 4.8.x fixup

Signed-off-by: Paul Reioux <reioux@gmail.com>
msm_hotplug: we don't want cause hotplug starting if we change its history_size attribute and hotplug is disabled.
             we don't want allocate resources if hotplug is disabled.