ARM: dts: msm: Add SBC APQ8084 board support

Add initial skeleton files for Single Board Computer platform.

Change-Id: Ia96dfe5c5f008d9229c47146a52f3ff3fd19b400
Signed-off-by: Eugene Yasman <eyasman@codeaurora.org>
Signed-off-by: Ilia Lin <ilialin@codeaurora.org>
Signed-off-by: Asaf Penso <apenso@codeaurora.org>
Signed-off-by: Tanya Finkel <tfinkel@codeaurora.org>