staging: comedi: comedidev.h: add PCI_VENDOR_ID_AMCC

Add a define for the Applied Micro Circuits Corp. PCI vendor id.
Remove the duplicates in the drivers.

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>