ARM: dts: OMAP5: Add ocp2scp data

Add ocp2scp data node in omap5 device tree file.

The information for the node added here can be found @
Documentation/devicetree/bindings/bus/omap-ocp2scp.txt

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>