PCI: dwc: ep: Call epc_create() early in dw_pcie_ep_init()

Move devm_pci_epc_create() to the beginning of dw_pcie_ep_init().

devm_pci_epc_create() is generic code that doesn't depend on any DWC
resource, so moving it earlier keeps all the subsequent devicetree-related
code together.

Link: https://lore.kernel.org/r/20250315201548.858189-9-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>

Author: bjorn-helgaas

drivers/pci/controller/dwc/pcie-designware-ep.c

@@ -904,6 +904,15 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 
 	INIT_LIST_HEAD(&ep->func_list);
 
+	epc = devm_pci_epc_create(dev, &epc_ops);
+	if (IS_ERR(epc)) {
+		dev_err(dev, "Failed to create epc device\n");
+		return PTR_ERR(epc);
+	}
+
+	ep->epc = epc;
+	epc_set_drvdata(epc, ep);
+
 	ret = dw_pcie_get_resources(pci);
 	if (ret)
 		return ret;
@@ -918,15 +927,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	if (ep->ops->pre_init)
 		ep->ops->pre_init(ep);
 
-	epc = devm_pci_epc_create(dev, &epc_ops);
-	if (IS_ERR(epc)) {
-		dev_err(dev, "Failed to create epc device\n");
-		return PTR_ERR(epc);
-	}
-
-	ep->epc = epc;
-	epc_set_drvdata(epc, ep);
-
 	ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
 	if (ret < 0)
 		epc->max_functions = 1;