soc: qcom: Update Cx ipeak driver for multimedia clients

Redesign the driver by introducing target specific ops.
Based on the target, the register programming can be
handled in the correspond target ops.
In v2, individual client has a dedicated register to
update about the operating threshold.

Change-Id: I2476a9118b4f30994065233cefba2472569ca340
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>