msm: kgsl: Avoid unnecessary GMU reinitialization

In case of some error cases that the hibernation does not
complete successfully and system goes to recover without
cutting power, we should not force GMU to initialize again.
Check the GMU hardware status to determine if it is the case.

Change-Id: I2b548d7001927095b7700d6df7ee3738820c3833
Signed-off-by: Thomas (Wonyoung) Yun <wyun@codeaurora.org>