msm: kgsl: Trigger recovery upon GMU assert in hwscheduling

A GMU assert puts GMU in NMI so it will no longer be responsive
and hence triggering recovery is important. Also, trigger recovery
on WDOG or CM3 fault interrupt from GMU. Make sure snapshot and
reset is only triggered if device was active. Also, clear the
CM3 fault every SLUMBER exit.

Change-Id: I9d6a063470bcd082a9cbecc5b8dcf0a412713bb1
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>