PCI: j721e: Add reset GPIO to struct j721e_pcie

Add reset GPIO to struct j721e_pcie, so it can be used at suspend and
resume stages.

Link: https://lore.kernel.org/linux-pci/20240102-j7200-pcie-s2r-v7-4-a2f9156da6c3@bootlin.com
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>

Author: tleb

drivers/pci/controller/cadence/pci-j721e.c

@@ -53,6 +53,7 @@ struct j721e_pcie {
 	u32			mode;
 	u32			num_lanes;
 	u32			max_lanes;
+	struct gpio_desc	*reset_gpio;
 	void __iomem		*user_cfg_base;
 	void __iomem		*intd_cfg_base;
 	u32			linkdown_irq_regfield;
@@ -545,6 +546,7 @@ static int j721e_pcie_probe(struct platform_device *pdev)
 			ret = dev_err_probe(dev, PTR_ERR(gpiod), "Failed to get reset GPIO\n");
 			goto err_get_sync;
 		}
+		pcie->reset_gpio = gpiod;
 
 		ret = cdns_pcie_init_phy(dev, cdns_pcie);
 		if (ret) {