staging: comedi: s626: tidy up comedi_lrange table

The comedi_lrange tables are fixed length based on the 'length' value
before the array of comedi_krange 'range' values. For aesthetics, remove
the trailing comma from last 'range' value.

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>