hns3 udma: add register and unregister segment

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I85R2F


CVE: NA

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Segment is a memory that alloced by user. User calls
register segment to allow hardware to read / write
data in memory. Driver should create a memory translate
and protect table of segment.

Signed-off-by: Weibo Zhao <zhaoweibo3@huawei.com>