xfs: remove xfs_blkdev_issue_flush

mainline inclusion
from mainline-v5.13-rc4
commit b5071ada
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I76JSK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b5071ada510a76eac0d02912bf66297b9e30ca59



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

It's a one line wrapper around blkdev_issue_flush(). Just replace it
with direct calls to blkdev_issue_flush().

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

conflicts:
fs/xfs/xfs_log.c
fs/xfs/xfs_super.c
fs/xfs/xfs_super.h

Signed-off-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Long Li <leo.lilong@huawei.com>