msm: kgsl: Vote against deep low power modes when GPU wakes up from slumber

System should not enter global low power modes during GPU wakeup.
To avoid this problem, explicitly vote against these modes at the
beginning of wakeup, and restore the vote to the default value
after that.

Change-Id: I436fe5562e26de57ea6fd39fe15ecde0b909e4aa
Signed-off-by: Yizheng Zhou <yizhengz@codeaurora.org>