staging: comedi: addi_apci_2200: separate from addi_common.c

This driver is for a simple 16 channel digital output (relays), 8 channel
digital input board. Using the addi-data "common" code introduces a lot
of bloat.

Copy the code in addi_common.c to this driver and remove the #include
that caused addi_common.c to be compiled with this driver. This will
allow removing the bloat.

Rename the auto_attach and detach functions so they have namespace
associated with this driver.

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>