with PCIVERBOSE (or corresponding module).
We currently have a few product names that exceed the old limit, and
this is triggering an SSP check in pci_devinfo(). This commit doesn't
directly address the SSP issue, but pushes the can down the road...
we don't need to include pcivar.h in the module. pcivar.h tries to pull
in machine/pci_machdep.h which doesn't exist on all machine/architecture
combos. Keeping track and building the module only for those that work
would have been a maintenance headache; this change allows us to build
the module on all systems, regardless of whether the system has pci
support or not.