staging: comedi: das08_cs: use comedi_pcmcia_{enable, disable}

Use the comedi_pcmcia_{enable,disable} helpers to enable/disable
the PCMCIA device.

This driver does not use interrupts so remove CONF_ENABLE_IRQ from
the link->config_flags.

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>