xfs: move XFS_LSN_CMP to xfs_log_format.h

xfs: move XFS_LSN_CMP to xfs_log_format.h

Because CYCLE_LSN/BLOCK_LSN are defined in xfs_log_format.h, XFS_LSN_CMP
forces a xfs_log_format.h dependency in xfs_log.h.  Move XFS_LSN_CMP
to xfs_log_format.h and drop the macro/inline indirection to clean up
our header mess a little bit.

This also helps xfsprogs, which doesn't have xfs_log.h, but needs
XFS_LSN_CMP.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>