soc: qcom: core_hang: Add snapshot of core hang driver

This is a snapshot of the core hang driver as of msm-4.4 commit
<0c8cf716fa02d0f>(Merge "msm: vidc: Change module license to GPL v2").

Change-Id: I325c3d22f48f1263ee46c9eecdf0eb8e3c95cdde
Signed-off-by: Kyle Yan <kyan@codeaurora.org>