msm: rq_stats: Disable hotplug and stats by default

Userspace closed source mpdecision binary is nessecary for PowerHAL to work.
As it depends on rq_stats, let's at least disable hotplugging and stats
collection by default. /sys/devices/system/cpu/cpu0/rq-stats/hotplug_disable
is now writable, so hotplug can be reenabled.

Also, add some bits related to current cpu policy.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
defconfig: Disable alucard hotplug

* Until we review and optimize it like others.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mmc: core: continue to wait, when unblocked by signal

Mmc thread is waiting for one of following events occurs:
- current running request completion (is_done_rcv)
- new request notification arrived (is_new_req)
- urgent request notification arrived (is_urgent)
or the thread received a signal. In this case none of described events
happened.

This change process the case, when mmc thread was unblocked from wait by
signal, for example system shutdown flow.

Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>