Add PCI plug-in

Separate the PCI related data into its own plug-in and remove it
from the hardware plug-in.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
Add new SCSI plug-in

Separate out the scsi data from the hardware plug-in.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>