Since multiple ARCH configuration will be appended into mach-hisi
directory, add ARCH_HISI as common configuration for different platforms
in mach-hisi.
Signed-off-by: NHaojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: NWei Xu <xuwei5@hisilicon.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>