ARM: dts: OMAP5: Move the gic node out of ocp space

GIC is not part of OCP space so move the gic DT node
out of ocp DT address space.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>