nvidia-detect: update Requires

Add Requires for pciutils and hwdata.

The pci_lookup_name() function returns the device name from
/usr/share/hwdata/pci.ids provided by the hwdata package. If
the device is not listed, 'Device <device_id>' is returned.

pciutils also requires hwdata so these should always be present
on the system but lets Require them to be sure.

Signed-off-by: Philip J Perry <phil@elrepo.org>