ARM: dts: msm: Add support for msm8996 CV2X boards

Add support for the msm8996 CV2X board that uses an mdm9650
module as endpoint for CV2X radio functionality. The msm8996
is responsible for running the CV2X application stack and
providing external debug and control access to the system.

Change-Id: I575f565580e8f81f15a9017a97aa064e7f2c6088
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>