repair: handle sparse inode alignment

repair: handle sparse inode alignment

Sparse inode support requires inode alignment to match inode chunk size.
xfs_repair currently expects inode alignment to match the default
cluster size or a scaled factor thereof.

Update sb_validate_ino_align() to consider the superblock valid if
sparse inode support is enabled and alignment matches the chunk size.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>