ARM: dts: msm: Add support for MSMGOLD

Add initial set of device tree and board files
to build the msmgold target.

Change-Id: I4bc2c6589e62443f32b8c353d5c082789dd6b378
Signed-off-by: Amit Atreya <aatrey@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>