msm: msm_bus: Enable sending BW requests to RPM

Enable sending BW request updates to RPM for shared nodes on
adhoc bus driver. Bug fixes to the states of the clock maintenance
to handle error cases correctly.

Change-Id: I9b9b1953cb801e169123875cc303dc354deb560e
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>