ANDROID: drm: kirin: Introduce kirin960

Add initial kirin960 support files.

Bug: 146450171
Signed-off-by: Xu YiPing <xuyiping@hisilicon.com>
[jstultz: fold in some other changes, this patch really needs to be
 split up into some cleaner steps]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I934004f4a15e1bba341807f6c63c13bf6c661698