ARM: dts: msm: Introduce bus topology for SM6150

Bus topology is the representation of bus connections
in SOC and is required for the bus driver to serve the
bandwidth requests from clients.

Change-Id: Ic44244ec597a45d0426aea00a3fa4c5e2b1f1492
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>