Hisilicon/D02: Remove D02 platform

D02 is no need to maintain now. it is time to retire that
platform and remove D02-related macro also.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ming Huang <ming.huang@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>