ARM: dts: msm: Introduce bus topology for sdm630

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: I474f390e86f291e78d6126ed769837b123e2a409
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>