ext4: avoid recheck extent for EXT4_EX_FORCE_CACHE

hulk inclusion
category: bugfix
bugzilla: 182952 https://gitee.com/openeuler/kernel/issues/I4DDEL



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Buffer with verified means that it has been checked before. No need
verify and call set_buffer_verified again.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>

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