msm: kgsl: Correctly handle CP_INIT failure

A stuck CP means that we will not be able to enter
slumber because gmu to cp interaction is impacted.
Therefore, take a gmu snapshot which also sets gmu
fault. The gmu fault will indicate the clean up
code to force a gmu_suspend() so as to set the
stage for the next submission to start afresh.

Change-Id: Ia90e6c447e9c1c87e04cf9ca3ed87eed5c17b07c
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>