raw: Use helpers for the hlist_nulls variant.

mainline inclusion
from mainline-v6.0-rc1
commit f289c02b
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ECEK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f289c02bf41b55fbfccf21d72c4ac44cd4a7a107



--------------------------------

hlist_nulls_add_head_rcu() and hlist_nulls_for_each_entry() have dedicated
macros for sk.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>