xfs: set XFS_FEAT_NLINK correctly

While xfs_has_nlink() is not used in kernel, it is used in userspace
(e.g. by xfs_db) so we need to set the XFS_FEAT_NLINK flag correctly
in xfs_sb_version_to_features().
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/libxfs/xfs_sb.c

@@ -70,6 +70,8 @@ xfs_sb_version_to_features(
 	/* optional V4 features */
 	if (sbp->sb_rblocks > 0)
 		features |= XFS_FEAT_REALTIME;
+	if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)
+		features |= XFS_FEAT_NLINK;
 	if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)
 		features |= XFS_FEAT_ATTR;
 	if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT)