staging: comedi: addi_apci_*: add module_comedi_pci_driver()

Pull the module init code out of addi_common.c and add it to
each addi-data driver. Rename the data and functions so they
have namespace associated with the drivers.

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