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")'. This snapshot
includes just the support for platform cooling device and doesn't include
core isolation.

Change-Id: Ib3befb0a813693b1cfe4a338c1cb57e75b39f9ea
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>