msm: kgsl: Correctly handle gmu fault interrupts

Do not trigger dispatcher based snapshot or recovery. Instead,
wait for the next kgsl -> GMU interaction to timeout thus
triggering GMU snapshot and appropriate recovery steps based
on whether gpu was active or not.

Change-Id: I17b4245f4e0113bfc902d7dae46bb24d0bc2b65d
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>