LinuxKPI: MODULE_DEVICE_TABLE() factor out the bus specific MODULE_PNP_INFO()

In order to be able to use MODULE_DEVICE_TABLE() with multiple bus
attachments, factor out the bus-specfic MODULE_PNP_INFO() and place
it next to the structure defining the table.

As it turns out bnxt(4) has been using the MODULE_DEVICE_TABLE() with
PCI attachments for the "auxillary" bus so far. That makes little sense.
Define the MODULE_PNP_INFO() to nothing for that. We may consider
pulling these LinucKPI bits in semi-native drivers into LinuxKPI
one day as that route is not really sustainabke.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: imp, dumbbell
Differential Revision: https://reviews.freebsd.org/D51049