xfs: fix some memory leaks in log recovery

mainline inclusion
from mainline-5.5-rc1
commit 050552cb
category: bugfix
bugzilla: 26779
CVE: NA

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

Fix a few places where we xlog_alloc_buffer a buffer, hit an error, and
then bail out without freeing the buffer.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

Conflict: fs/xfs/xfs_log_recover.c
Signed-off-by: yu kuai <yukuai3@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>