msm: kgsl: Remove redundant logging on state change

This code would cause issues in the SLEEP state transition.
As the information it provides can be deduced other ways
remove the logging.

Change-Id: Ia6c7c1efa17c44340454cfcc117f98c3c2dd9fda
Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>