add the device tree binding for the HiSilicon hip04 ethernet controller
based on Documentation/devicetree/bindings/net/hisilicon-hip04-net.txt
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>