cxgb4: restructure VF mgmt code

restructure the code which adds support for configuring
PCIe VF via mgmt netdevice. which was added by
commit 7829451c ("cxgb4: Add control net_device for
configuring PCIe VF")

Original work by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

@@ -312,6 +312,7 @@ struct vpd_params {
 };
 
 struct pci_params {
+	unsigned int vpd_cap_addr;
 	unsigned char speed;
 	unsigned char width;
 };