staging: comedi: das16: remove an unnecessary check in the attach

If the user does not specify the analog output range the private data
'user_ao_range_table' will not be allocated. The comedi core will detect
the NULL s->range_table and automatically set it to &range_unknown.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed