jbd2: increase IO priority for writing revoke records

jbd2: increase IO priority for writing revoke records

Commit '6a3afb6ac6df ("jbd2: increase the journal IO's priority")'
increases the priority of journal I/O by marking I/O with the
JBD2_JOURNAL_REQ_FLAGS. However, that commit missed the revoke buffers,
so also addresses that kind of I/Os.

Fixes: 6a3afb6ac6df ("jbd2: increase the journal IO's priority")
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20241203014407.805916-2-yi.zhang@huaweicloud.com
Reviewed-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>