net: dsa: felix: remove felix_info :: imdio_base

This address is only relevant for the vsc9959, which is a PCIe device
that holds its switch registers in a different PCIe BAR compared to the
registers for the internal MDIO controller.

Hide this aspect from the common felix driver and move the
pci_resource_start() call to the only place that needs it, which is in
vsc9959_mdio_bus_alloc().
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/ocelot/felix.h

@@ -85,7 +85,6 @@ struct felix {
 	struct mii_bus			*imdio;
 	struct phylink_pcs		**pcs;
 	resource_size_t			switch_base;
-	resource_size_t			imdio_base;
 	enum dsa_tag_protocol		tag_proto;
 	const struct felix_tag_proto_ops *tag_proto_ops;
 	struct kthread_worker		*xmit_worker;

drivers/net/dsa/ocelot/felix_vsc9959.c

@@ -1003,9 +1003,11 @@ static void vsc9959_wm_stat(u32 val, u32 *inuse, u32 *maxuse)
 
 static int vsc9959_mdio_bus_alloc(struct ocelot *ocelot)
 {
+	struct pci_dev *pdev = to_pci_dev(ocelot->dev);
 	struct felix *felix = ocelot_to_felix(ocelot);
 	struct enetc_mdio_priv *mdio_priv;
 	struct device *dev = ocelot->dev;
+	resource_size_t imdio_base;
 	void __iomem *imdio_regs;
 	struct resource res;
 	struct enetc_hw *hw;
@@ -1021,10 +1023,12 @@ static int vsc9959_mdio_bus_alloc(struct ocelot *ocelot)
 		return -ENOMEM;
 	}
 
+	imdio_base = pci_resource_start(pdev, VSC9959_IMDIO_PCI_BAR);
+
 	memcpy(&res, &vsc9959_imdio_res, sizeof(res));
 	res.flags = IORESOURCE_MEM;
-	res.start += felix->imdio_base;
-	res.end += felix->imdio_base;
+	res.start += imdio_base;
+	res.end += imdio_base;
 
 	imdio_regs = devm_ioremap_resource(dev, &res);
 	if (IS_ERR(imdio_regs))
@@ -2665,7 +2669,6 @@ static int felix_pci_probe(struct pci_dev *pdev,
 	ocelot->num_flooding_pgids = OCELOT_NUM_TC;
 	felix->info = &felix_info_vsc9959;
 	felix->switch_base = pci_resource_start(pdev, VSC9959_SWITCH_PCI_BAR);
-	felix->imdio_base = pci_resource_start(pdev, VSC9959_IMDIO_PCI_BAR);
 
 	pci_set_master(pdev);