sk_buff: Fix KABI break for the modification of struct sk_buff

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9HVTH


CVE: CVE-2024-26921

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Fix KABI break when backport CVE-2024-26921 patch by
reverting modification of struct sk_buff.

Fixes: 18685451fc4e ("inet: inet_defrag: prevent sk release while still in use")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>