staging: comedi: amplc_pc236: move static board data

Move the static board data in `pc236_isa_boards[]` and `pc236_pci_board`
closer to where they are used.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>