msm: kgsl: Add "smmu_vote" clock to the clock names list

Add "smmu_vote" clock to kgsl clocks name list. This is
needed on all GPU having MMU500 to ensure that there
is no clock gating of the AXI clk, which drives the MMU
register access.

Change-Id: I0a8cb3d3fef17a97cdf12f12d223c167a5ee2cf4
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>