msm: kgsl: Perform reset sequence during recovery on a6xx

On targets which have GMU, it is recommended to halt GBIF GX
and CX and soft reset the GPU to make recovery more robust.
This sequence also helps to recover successfully in case of
stall-on-fault.

Change-Id: Ie642a8f99aa6f4aca7c31f7e769d1ef14b4b60df
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>