block: always align request_wrapper to cacheline

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I65K8D


CVE: NA

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

____cacheline_aligned_in_smp will only be effective if CONFIG_SMP is
enabled, use ____cacheline_aligned instead.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>