Merge tag 'drm-hisilicon-hibmc-next-2019-08-26' of https://github.com/xin3liang/linux into drm-next

Three small cleanup and fix patches for 5.4 hisilicon hibmc driver.
I have tested and verified on taishan 2280v1/v2 machines.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: xinliang <z.liuxinliang@hisilicon.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5D63A271.7080400@hisilicon.com