EMMC: hisi extensions for dw mmc host controller

ascend inclusion
category: feature
feature: Ascend emmc adaption
bugzilla: https://gitee.com/openeuler/kernel/issues/I4F4LL


CVE: NA

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Hisilicon specific extensions for Synopsys DW Memory Card
Storage Host Controller.

Signed-off-by: zhangguijiang <zhangguijiang@huawei.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>