msm: kgsl: Add OOB requests for perfcounter queries

Some perfcounter queries might require the GMU/GPU to be
fully on before being able to read the counter. Ensure the
block is on with an OOB request to the GMU.

Change-Id: I0f4cefc5afd2f3b8d5d4896711b10b3200557efe
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>