clk: qcom: Remove mmssnoc_a_clk_cpu_vote clock instance for msm8996

mmssnoc_a_clk_cpu_vote clock is not required on msm8996, so
remove the clock instance for the same.

Change-Id: Ibf1cbb9dc67c9255df09c32a67c320f8bb3ecbc7
Signed-off-by: Amit Nischal <anischal@codeaurora.org>