ARM: dts: msm: add support for apq8026 CDP

The CDP board is the latest addition in the list of 8026 boards.
Add support for both v1 and v2 versions of the chip. Also add
the build support for these new files.

Change-Id: Ibdebb8646fb7bcbfef41c09aa173aec4b890507f
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>