net/axgbe: use PCI root complex device to distinguish device

net/axgbe: use PCI root complex device to distinguish device

"bus/pci: optimize bus scan" broke axgbe on V1000/R1000.
RV root complex pci device does not have any kernel driver assigned
so it is removed from pci scan list which is used in
"net/axgbe: add a HW quirk for register definitions".

Get root complex device id directly from pci sysfs instead of
pci scan list.

Fixes: 991e0b1dbc4a ("net/axgbe: add a HW quirk for register definitions")
Cc: stable@dpdk.org
Signed-off-by: Chandubabu Namburu <chandu@amd.com>
Acked-by: Selwin Sebastian <selwin.sebastian@amd.com>