ARM: dts: msm: Add a common device tree for VM platforms

Add a common device tree for automotive virtual machine
platforms to reduce code duplication across virtual machine
targets. This device tree will apply to the SA 6155,
SA 8155, and SA 8195 VM targets.

Change-Id: If6d89d9ba1d17c1b1f1370d0888e23d38837e617
Signed-off-by: Anant Goel <anantg@codeaurora.org>