clk: qcom: Add support for Voter and hardware clocks

MSMfalcon requires the voter & voter branch clocks to be able to
enabled/disabled & set rate on these clocks from the client. Also add
support for few hardware & dummy clocks to be able to perform clock ops
from the clients.

Change-Id: I54941fbcc0a4b4d24dcb01f4628aa4dc99fcbab9
Signed-off-by: Taniya Das <tdas@codeaurora.org>