clk: qcom: 8916: Remove CX vote for apss_ahb clock

SW will keep the clock rate to 19.2MHz, but we donot
need to keep a vote on CX as there is no client, who
will remove it vote.

Change-Id: I0810a0d3661addd817841832624474c98b58b834
Signed-off-by: Taniya Das <tdas@codeaurora.org>