arm/dts: omap4: Add ocp2scp data

Add ocp2scp data node in omap4 device tree file.

Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>