soc: Support for EZchip SoC

This header file is for NPS400 SoC.
It includes macros for accessing memory mapped registers.
These are functional registers that core can use to configure SoC.

Signed-off-by: Noam Camus <noamc@ezchip.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>