PCI: designware-plat: Prefer of_device_get_match_data()

The designware-plat driver only needs the device data, not the whole struct
of_device_id.  Use of_device_get_match_data() instead of of_match_device().
No functional change intended.

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20211223011054.1227810-5-helgaas@kernel.org
Signed-off-by: Fan Fei <ffclaire1224@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>

Author: firebolt007

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

@@ -122,15 +122,13 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
 	struct dw_plat_pcie *dw_plat_pcie;
 	struct dw_pcie *pci;
 	int ret;
-	const struct of_device_id *match;
 	const struct dw_plat_pcie_of_data *data;
 	enum dw_pcie_device_mode mode;
 
-	match = of_match_device(dw_plat_pcie_of_match, dev);
-	if (!match)
+	data = of_device_get_match_data(dev);
+	if (!data)
 		return -EINVAL;
 
-	data = (struct dw_plat_pcie_of_data *)match->data;
 	mode = (enum dw_pcie_device_mode)data->mode;
 
 	dw_plat_pcie = devm_kzalloc(dev, sizeof(*dw_plat_pcie), GFP_KERNEL);