staging: comedi: das08: remove 'id' from boardinfo

With the bus specific code split out, the device id in the boardinfo
is no longer needed. Remove it.

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