msm: thermal: Initialize per cpu variables during thermal init

Initializing the per cpu variables inside frequency/hotplug
probe function has a possibility that it may result in
uninitialized variables. So initialize the per cpu variables
in the thermal drivers init function.

Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>