staging: comedi: cb_pcidas: remove unused io region size defines

The defines for the size of the io regions are not used in the
driver. Also, this information can be found using the pci helper
pci_resource_len(). Remove the defines.

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>