staging: comedi: Kconfig: update COMEDI_AMPLC_DIO200_PCI option

Update the prompt line and description for the COMEDI_AMPLC_DIO200_PCI
config option to add the new PCIe boards supported by the "amplc_dio200"
driver.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>