ARM: dts: msm: introduce bus topology for msmgold

Introduce bus topology for msmgold. This is a representation
of the bus connections in the SOC and allows the bus driver
to setup bandwidth requests from clients for the paths desired.

Change-Id: I031099c70e42aaed7b7e1514650774224be474f8
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>