msm: msm_bus: Add NoC limiter and regulator mode for adhoc driver

Add the ability to switch NoC masters to be in limiter and regulator mode
for the adhoc bus driver. These modes offer differing degrees of
throttling the io traffic from NoC master ports if needed.

Change-Id: If2f868430ebccff1a11aad7d90fa5b352ea2c876
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>