ARM: dts: Add secure-firmware boot support for OrigenQaud board

OrigenQuad board boots with secure firmware support. Enable support for
reading smc commands.

The binding has been updated as per the documentation provided in
Documentation/devicetree/bindings/arm/samsung-boards.txt.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>