drivers: thermal: cpu_cooling: Snapshot of cpu cooling driver

Add a snapshot of CPU cooling device driver changes from
msm-4.14 from 'commit <2c89a516da31> ("drivers: cpu_cooling: Remove
cooling list lock during post suspend handling")'.

Change-Id: I0c98b886d5237c30fb2a4207fe2b84cd05d333ef
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>