Platforms: add skeleton of hikey platform

Add the skeleton of HiKey platform with generic BDS.
Support both 1GB and 2GB DDR RAM HiKey hardware.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
10 files changed