xfs: make better use of the 'state' variable in xfs_bmap_del_extent_real

We already have all the information about the fork a=D1=95 well as additional
tracing information, so pass that to xfs_iext_remove().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>