ARM: dts: msm: add bus scale table in dt for samarium

Add bus scale table in dt for msm samarium.
This includes info such as the number of usecases,
number of paths and bus bandwidths associated with
the various MDP usecases.

Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
Change-Id: Idfa390c2618ad907b3d6534d0fabd3af731f8e75