msm: msm_bus: Modify set bandwidth for adhoc driver

Add support to set bandwidth for BIMC bus masters in steady state
conditions where a master's AB vote can be used to set bandwidth
limits for that master port.

Change-Id: Ia148a1d1b9a58c87ac04903c53e4e3ea1300dd5e
Signed-off-by: Dan Sneddon <dsneddon@codeaurora.org>
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>