msm: clock-local2: Add new clock control library for the new HW interface.

Introduce a driver that implements an API to control clocks
on targets that adhere to the new clock controller hardware
design and interface, the first of which is the MSM Copper.

Change-Id: Ie92843fa2a5f220eb77eb7db7eb21e74761e7a24
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>