clk: qcom: Add smd-rpm voter & voter branch clocks for MSM8996

MSM8996 requires the voter & voter branch clocks to be
available for clients to be able to enable/disable and
set rate on these clocks.
Also add support for keeping active set vote on mmssnoc
and pnoc voter clocks.

Change-Id: Ie596ddee60aac3e6fc996f9a3e8dc988b0f4aa88
Signed-off-by: Amit Nischal <anischal@codeaurora.org>