xfs: move (and rename) the deferred bmap-free tracepoints

Source kernel commit: 3481b68285238054be519ad0c8cad5cc2425e26c

Rename the deferred bmap-free to extent_free and make them only
trigger when we're really running deferred ops.

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

diff --git a/libxfs/xfs_alloc.c b/libxfs/xfs_alloc.c
index 334c5fc..8ed4bde 100644
--- a/libxfs/xfs_alloc.c
+++ b/libxfs/xfs_alloc.c
@@ -2816,8 +2816,6 @@
 
 	ASSERT(len != 0);
 
-	trace_xfs_bmap_free_deferred(mp, agno, 0, agbno, len);
-
 	if (XFS_TEST_ERROR(false, mp,
 			XFS_ERRTAG_FREE_EXTENT,
 			XFS_RANDOM_FREE_EXTENT))