Revert "[Huawei] block: stop wait rcu once we can ensure no io while elevator init"

hulk inclusion
category: performance
bugzilla: 174005 https://gitee.com/openeuler/kernel/issues/I4DDEL



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This reverts commit b2d85dfb8c1de87700afae78df99715d3a0788a5. This patch
is a local patch try to remove the useless rcu gap for loop setup. Now
mainline has the solution too. Revert local patch.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>

Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>