msm: kgsl: Increase KGSL_MAX_CLKS value

With addition of "smmu_vote" clock in kgsl clock
names list. Supported clock count is now 17. update
KGSL_MAX_CLKS value to 17 to make sure driver votes
for "smmu_vote" clock.

Change-Id: I140382b86245b9b34188f90a2b418dac43f2321a
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>