xfs: change xfs_bmap_{finish,cancel,init,free} -> xfs_defer_*

Drop the compatibility shims that we were using to integrate the new
deferred operation mechanism into the existing code.  No new code.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_bmap_util.h b/fs/xfs/xfs_bmap_util.h
index 51aadde..68a621a 100644
--- a/fs/xfs/xfs_bmap_util.h
+++ b/fs/xfs/xfs_bmap_util.h
@@ -21,7 +21,7 @@
 /* Kernel only BMAP related definitions and functions */
 
 struct xfs_bmbt_irec;
-struct xfs_bmap_free_item;
+struct xfs_extent_free_item;
 struct xfs_ifork;
 struct xfs_inode;
 struct xfs_mount;