xfs: Fix the situation that mount operation rejects corrupted XFS

xfs: Fix the situation that mount operation rejects corrupted XFS

On upstream kernel, running some tests which corrupt XFS on purpose
got the mismatched output. e.g. running xfs/087:
------------------------------------------------
 + check fs
 + corrupt image
 + mount image
-+ modify files
-broken: 1
 + repair fs
 + mount image (2)
------------------------------------------------

It is reasonable for corrupted XFS to be caught and rejected by mount
or read/write operation.

Fixes: 0828657542ea ("xfs: fix blocktrash fuzzers")
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>