6lowpan: remove unnecessary ret variable
6lowpan: remove unnecessary ret variable

Signed-off-by: Alexander Aring <d03dbcdedb9639e397df9b8578e8fc8274f4e6c4@gmail.com>
Reviewed-by: Werner Almesberger <6f6c33f020064777da8a82cd2d2142de2c2cdf9d@almesberger.net>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs