staging: comedi: amplc_dio200: replace macros with inline functions

Replace the IS_ISA_BOARD() and IS_PCI_BOARD() functionlike macros with
inline functions is_isa_board() and is_pci_board().  Also call
is_pci_board() in dio200_find_pci_board() instead of an explicit
comparison operator.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>