xfs: fix a few erroneous process_error calls in the scrubbers

There are a few places where we make a libxfs api call on behalf of some
object other than the one we're scrubbing but inadvertently call the
regular process_error function.  When this happens we mark the object
corrupt even though it was corruption in /some other/ object that
actually produced the -EFSCORRUPTED code.  The correct output flag for
these situations is SCRUB_OFLAG_XFAIL, not SCRUB_OFLAG_CORRUPT, so fix
this now that we also have a helper to set these.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/scrub/inode.c

@@ -619,7 +619,7 @@ xfs_scrub_inode(
 	if (xfs_is_reflink_inode(sc->ip)) {
 		error = xfs_reflink_inode_has_shared_extents(sc->tp, sc->ip,
 				&has_shared);
-		if (!xfs_scrub_process_error(sc, XFS_INO_TO_AGNO(mp, ino),
+		if (!xfs_scrub_xref_process_error(sc, XFS_INO_TO_AGNO(mp, ino),
 				XFS_INO_TO_AGBNO(mp, ino), &error))
 			goto out;
 		if (!has_shared)