xfs: remote xattr removal in xfs_attr_set_iter() is conditional

xfs: remote xattr removal in xfs_attr_set_iter() is conditional

Source kernel commit: 2e7ef218e489f5b3f5156a305b55a08c41839c1b

We may not have a remote value for the old xattr we have to remove,
so skip over the remote value removal states and go straight to
the xattr name removal in the leaf/node block.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Allison Henderson<allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>