staging: comedi: amplc_pci224: remove PCI_DEVICE_ID_... macros

The macros `PCI_DEVICE_ID_AMPLICON_PCI224` and
`PCI_DEVICE_ID_AMPLICON_PCI234` are only used in the PCI module device
table `amplc_pci224_pci_table[]`.  Just expand the macros where they are
used and remove them.  The macro `PCI_DEVICE_ID_INVALID` is no longer
used either, so remove it.

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