msm: clock-copper: Add support for RPM clocks and bus/memory scaling

To enable the bus driver to scale buses via the RPM
and/or via the clock driver, do the following:

1. Add RPM clocks for the System NOC, Peripheral NOC,
   Config NOC, BIMC, OCMEMGX.
2. Add a locally controlled clock to control the OCMEM
   NOC, since the applications processor now controls it.
3. Remove the MMSSNOC AHB clock source, since the RPM
   now controls it.
4. Finally, add voter clocks for the bus driver to allow
   control of the above clocks.

Change-Id: Ie5bd2456f30bc9f01ebefa97a86c5195ec8e3039
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>