staging: comedi: cleanup comedi_recognize()

This function is more complicated than it needs to be because of the
consts.  It's not worth saving them when we drop the consts anyway
when we return (void *)name_ptr.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc:
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>