EMMC: add hisi_mmc_core

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


CVE: NA

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To support Ascend HiSilicon emmc chip, we add specific extensions in
mmc core, include mmc card sleep/awake/reset, cache ctrl, power vcc
adaptions and etc. Also, we enable some features for emmc5.0/5.1.

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