xfs_repair: reinitialize the root directory nlink correctly

xfs_repair: reinitialize the root directory nlink correctly

In mk_root_dir, we reinitialize the root directory inode with a link
count of 1.  This differs from mkfs parseproto, which initializes the
root to have a link count of 2.  The nlink discrepancy in repair is
caught and corrected during phase 7, but this is unnecessary since we
should set it properly in the first place.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>