clk: qcom: clk-cpu-osm: Add an additional voter clock for L3

Add a new l3_misc_vote_clk clock for clients to use to
cast rate and enable votes on the L3 cluster clock.

Change-Id: I1fec757426e2c0666c8333f9b33b8fc1be0833dc
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>