kabi: net: reserve space for net bpf subsystem related structure

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4HE7P?from=project-issue


CVE: NA

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Reserve some fields beforehand for net bpf framework related structures prone
to change.

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Signed-off-by: Wang Hai <wanghai38@huawei.com>
Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>