ARM: dts: msm: Add device tree for MPQ8092 DTV

Add a DTSI file and a top-level DTS file needed to support
the MPQ8092 DTV platform in a dedicated DTS file.

Change-Id: I01575e46f1b78ea6bd58a74a6adb90e59ffa67f3
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>