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kgsl_active_count_wait() returns an error on failure and if it does
that is a great indication that we probably don't want to go to
suspend right now.  Pay attention to what the function returns and
do what it says.

Change-Id: Ic0dedbad44cd009e5318eccc567b0c3002e88bb3
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>