Revert "block: fix null-deref in percpu_ref_put"

hulk inclusion
category: bugfix
bugzilla: 187268, https://gitee.com/openeuler/kernel/issues/I5N162



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This reverts commit 51e35e67.

There is a new fix for this problem in the mainline patch, so the patch
should return to the mainline solution.

mainline patch:
d36a9ea5 ("block: fix use-after-free of q->q_usage_counter")

Fixes: 51e35e67("block: fix null-deref in percpu_ref_put")
Signed-off-by: Zhong Jinghua <zhongjinghua@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>