drm/msm: add debugfs capability to trigger ESD recovery

Add a debugfs entry to force ESD recovery process from command line.
This will help to debug any issues related to ESD feature in runtime.

Change-Id: I77dd21dad6ab91fbbfb61e9f1a09ad9758a8e9f9
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>