xfs: finish removing IOP_* macros.

In optimising the CIL operations, some of the IOP_* macros for
calling log item operations were removed. Remove the rest of them as
Christoph requested.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Geoffrey Wehrman <gwehrman@sgi.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

fs/xfs/xfs_trans_buf.c

@@ -505,7 +505,7 @@ xfs_trans_brelse(xfs_trans_t	*tp,
 
 /*
  * Mark the buffer as not needing to be unlocked when the buf item's
- * IOP_UNLOCK() routine is called.  The buffer must already be locked
+ * iop_unlock() routine is called.  The buffer must already be locked
  * and associated with the given transaction.
  */
 /* ARGSUSED */