msm: kgsl: Retry hard reset more than once on failure

It has been observed that if hard reset is tried again after failure
then it succeeds, so add a loop to retry hard reset a few times
before considering it a failure.

Change-Id: I46dd8a420d5fd49941d096168aafd2eab693bebb
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>