keys: Include key domain tag in the iterative search

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I49KW1


CVE: NA

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Add domain tag to the key_match_data. If set, check domain tag in the
default match function and asymmetric keys match functions.

This will allow to use the key domain tag in the search criteria for
the iterative search, not only for the direct lookup that is based on
the index key.

Signed-off-by: Krzysztof Struczynski <krzysztof.struczynski@huawei.com>
Reviewed-by: Zhang Tianxing <zhangtianxing3@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>