msm: kgsl: Take GMU snapshot on GMU failures

GMU can fail to turn on GX or it can fail the START HFI.
So take snapshot and put GMU in NMI. When this happens,
kgsl will call gmu_stop() and as GMU is already in fault
aka NMI, reset the GMU and GPU. If oob during adreno_stop
fails, take gmu snapshot and only do things that don't need
gx to be on.

Change-Id: Iafc9b34063a7ff2415d3462dd289b52e425fbf3b
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>