msm: kgsl: Recover GPU from adreno_stop failure

In case GMU OOB request times out, if the GPU is till on,
adreno_stop function shall be fully executed to avoid
kernel panic later. The change gives chance to recover GPU
in case GMU malfunctions.

Change-Id: Ibe366e07b56dfd357f402b78913b7212c2e64c5b
Signed-off-by: George Shen <sqiao@codeaurora.org>